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251<div id="searchbox"></div><div class="sidebar-scroll"><div class="sidebar-tree">
252  <p class="caption" role="heading"><span class="caption-text">Overview:</span></p>
253<ul class="current">
254<li class="toctree-l1 current current-page"><a class="current reference internal" href="#">Introduction to HED</a></li>
255<li class="toctree-l1"><a class="reference internal" href="HowCanYouUseHed.html">How can you use HED?</a></li>
256<li class="toctree-l1"><a class="reference internal" href="HedAnnotationSemantics.html">Making HED meaningful</a></li>
257<li class="toctree-l1"><a class="reference internal" href="HedSchemas.html">HED schemas</a></li>
258<li class="toctree-l1"><a class="reference internal" href="WhatsNew.html">What’s new?</a></li>
259</ul>
260<p class="caption" role="heading"><span class="caption-text">Tutorials and guides:</span></p>
261<ul>
262<li class="toctree-l1"><a class="reference internal" href="BidsAnnotationQuickstart.html">BIDS annotation quickstart</a></li>
263<li class="toctree-l1"><a class="reference internal" href="HedAnnotationQuickstart.html">HED annotation quickstart</a></li>
264<li class="toctree-l1"><a class="reference internal" href="NWBAnnotationQuickstart.html">NWB annotation quickstart</a></li>
265<li class="toctree-l1"><a class="reference internal" href="HedValidationGuide.html">HED validation guide</a></li>
266<li class="toctree-l1"><a class="reference internal" href="HedSearchGuide.html">HED search guide</a></li>
267<li class="toctree-l1"><a class="reference internal" href="HedSummaryGuide.html">HED summary guide</a></li>
268<li class="toctree-l1"><a class="reference internal" href="HedConditionsAndDesignMatrices.html">Design matrices</a></li>
269</ul>
270<p class="caption" role="heading"><span class="caption-text">Tool documentation:</span></p>
271<ul>
272<li class="toctree-l1 has-children"><a class="reference internal" href="hed-server/index.html">HED online tools</a><input aria-label="Toggle navigation of HED online tools" class="toctree-checkbox" id="toctree-checkbox-1" name="toctree-checkbox-1" role="switch" type="checkbox"/><label for="toctree-checkbox-1"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
273<li class="toctree-l2"><a class="reference internal" href="hed-server/user_guide.html">User guide</a></li>
274<li class="toctree-l2"><a class="reference internal" href="hed-server/deployment.html">Deployment</a></li>
275<li class="toctree-l2 has-children"><a class="reference internal" href="hed-server/api/index.html">API reference</a><input aria-label="Toggle navigation of API reference" class="toctree-checkbox" id="toctree-checkbox-2" name="toctree-checkbox-2" role="switch" type="checkbox"/><label for="toctree-checkbox-2"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
276<li class="toctree-l3"><a class="reference internal" href="hed-server/api/web_application.html">Web application</a></li>
277<li class="toctree-l3"><a class="reference internal" href="hed-server/api/operations.html">Operations</a></li>
278<li class="toctree-l3"><a class="reference internal" href="hed-server/api/utilities.html">Utilities</a></li>
279</ul>
280</li>
281</ul>
282</li>
283<li class="toctree-l1 has-children"><a class="reference internal" href="hed-python/index.html">Python HEDTools</a>
283<input aria-label="Toggle navigation of Python HEDTools" class="toctree-checkbox" id="toctree-checkbox-3" name="toctree-checkbox-3" role="switch" type="checkbox"/><label for="toctree-checkbox-3"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
284<li class="toctree-l2"><a class="reference internal" href="hed-python/user_guide.html">User guide</a></li>
285<li class="toctree-l2 has-children"><a class="reference internal" href="hed-python/api/index.html">API</a><input aria-label="Toggle navigation of API" class="toctree-checkbox" id="toctree-checkbox-4" name="toctree-checkbox-4" role="switch" type="checkbox"/><label for="toctree-checkbox-4"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
286<li class="toctree-l3"><a class="reference internal" href="hed-python/api/models.html">Models</a></li>
287<li class="toctree-l3"><a class="reference internal" href="hed-python/api/schema.html">Schema</a></li>
288<li class="toctree-l3"><a class="reference internal" href="hed-python/api/validator.html">Validator</a></li>
289<li class="toctree-l3"><a class="reference internal" href="hed-python/api/tools.html">Tools</a></li>
290<li class="toctree-l3"><a class="reference internal" href="hed-python/api/errors.html">Error handling</a></li>
291</ul>
292</li>
293</ul>
294</li>
295<li class="toctree-l1 has-children"><a class="reference internal" href="hed-javascript/index.html">JavaScript HEDTools</a><input aria-label="Toggle navigation of JavaScript HEDTools" class="toctree-checkbox" id="toctree-checkbox-5" name="toctree-checkbox-5" role="switch" type="checkbox"/><label for="toctree-checkbox-5"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
296<li class="toctree-l2"><a class="reference external" href="https://www.hedtags.org/hed-web">Browser-based validator</a></li>
297<li class="toctree-l2"><a class="reference external" href="https://www.hedtags.org/hed-javascript">JavaScript API</a></li>
298</ul>
299</li>
300<li class="toctree-l1 has-children"><a class="reference internal" href="hed-matlab/index.html">MATLAB HEDTools</a><input aria-label="Toggle navigation of MATLAB HEDTools" class="toctree-checkbox" id="toctree-checkbox-6" name="toctree-checkbox-6" role="switch" type="checkbox"/><label for="toctree-checkbox-6"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
301<li class="toctree-l2"><a class="reference internal" href="hed-matlab/user_guide.html">User guide</a></li>
302<li class="toctree-l2"><a class="reference internal" href="hed-matlab/api2.html">API reference</a></li>
303</ul>
304</li>
305<li class="toctree-l1 has-children"><a class="reference internal" href="ndx-hed/index.html">NWB HED extension</a><input aria-label="Toggle navigation of NWB HED extension" class="toctree-checkbox" id="toctree-checkbox-7" name="toctree-checkbox-7" role="switch" type="checkbox"/><label for="toctree-checkbox-7"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
306<li class="toctree-l2"><a class="reference internal" href="ndx-hed/description.html">Getting Started</a></li>
307<li class="toctree-l2"><a class="reference internal" href="ndx-hed/api.html">API Reference</a></li>
308<li class="toctree-l2"><a class="reference internal" href="ndx-hed/format.html">ndx-hed</a></li>
309<li class="toctree-l2"><a class="reference internal" href="ndx-hed/release_notes.html">Release Notes</a></li>
310<li class="toctree-l2"><a class="reference internal" href="ndx-hed/credits.html">Credits</a></li>
311<li class="toctree-l2"><a class="reference internal" href="ndx-hed/credits.html#legal">Legal</a></li>
312</ul>
313</li>
314<li class="toctree-l1 has-children"><a class="reference internal" href="hed-schemas/index.html">HED schema development</a><input aria-label="Toggle navigation of HED schema development" class="toctree-checkbox" id="toctree-checkbox-8" name="toctree-checkbox-8" role="switch" type="checkbox"/><label for="toctree-checkbox-8"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
315<li class="toctree-l2"><a class="reference internal" href="hed-schemas/schemas_overview.html">HED schemas overview</a></li>
316<li class="toctree-l2"><a class="reference internal" href="hed-schemas/developer_guide.html">Schema developer guide</a></li>
317<li class="toctree-l2"><a class="reference internal" href="hed-schemas/api.html">API reference</a></li>
318</ul>
319</li>
320<li class="toctree-l1 has-children"><a class="reference internal" href="table-remodeler/index.html">Table-remodeler</a><input aria-label="Toggle navigation of Table-remodeler" class="toctree-checkbox" id="toctree-checkbox-9" name="toctree-checkbox-9" role="switch" type="checkbox"/><label for="toctree-checkbox-9"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
321<li class="toctree-l2"><a class="reference internal" href="table-remodeler/quickstart.html">
321Remodeler tutorial</a></li>
322<li class="toctree-l2"><a class="reference internal" href="table-remodeler/user_guide.html">User guide</a></li>
323<li class="toctree-l2 has-children"><a class="reference internal" href="table-remodeler/operations/index.html">Operations reference</a><input aria-label="Toggle navigation of Operations reference" class="toctree-checkbox" id="toctree-checkbox-10" name="toctree-checkbox-10" role="switch" type="checkbox"/><label for="toctree-checkbox-10"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
324<li class="toctree-l3 has-children"><a class="reference internal" href="table-remodeler/operations/transformations/index.html">Transformations</a><input aria-label="Toggle navigation of Transformations" class="toctree-checkbox" id="toctree-checkbox-11" name="toctree-checkbox-11" role="switch" type="checkbox"/><label for="toctree-checkbox-11"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
325<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/factor_column.html">Factor column</a></li>
326<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/factor_hed_tags.html">Factor HED tags</a></li>
327<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/factor_hed_type.html">Factor HED type</a></li>
328<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/merge_consecutive.html">Merge consecutive</a></li>
329<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/remap_columns.html">Remap columns</a></li>
330<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/remove_columns.html">Remove columns</a></li>
331<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/remove_rows.html">Remove rows</a></li>
332<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/rename_columns.html">Rename columns</a></li>
333<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/reorder_columns.html">Reorder columns</a></li>
334<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/transformations/split_rows.html">Split rows</a></li>
335</ul>
336</li>
337<li class="toctree-l3 has-children"><a class="reference internal" href="table-remodeler/operations/summarizations/index.html">Summarizations</a><input aria-label="Toggle navigation of Summarizations" class="toctree-checkbox" id="toctree-checkbox-12" name="toctree-checkbox-12" role="switch" type="checkbox"/><label for="toctree-checkbox-12"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
338<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/summarizations/summarize_column_names.html">Summarize column names</a></li>
339<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/summarizations/summarize_column_values.html">Summarize column values</a></li>
340<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/summarizations/summarize_definitions.html">Summarize definitions</a></li>
341<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/summarizations/summarize_hed_tags.html">Summarize HED tags</a></li>
342<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/summarizations/summarize_hed_type.html">Summarize HED type</a></li>
343<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/summarizations/summarize_hed_validation.html">Summarize HED validation</a></li>
344<li class="toctree-l4"><a class="reference internal" href="table-remodeler/operations/summarizations/summarize_sidecar_from_events.html">Summarize sidecar from events</a></li>
345</ul>
346</li>
347</ul>
348</li>
349<li class="toctree-l2 has-children"><a class="reference internal" href="table-remodeler/api/index.html">API reference</a><input aria-label="Toggle navigation of API reference" class="toctree-checkbox" id="toctree-checkbox-13" name="toctree-checkbox-13" role="switch" type="checkbox"/><label for="toctree-checkbox-13"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
350<li class="toctree-l3"><a class="reference internal" href="table-remodeler/api/core.html">Core components</a></li>
351<li class="toctree-l3"><a class="reference internal" href="table-remodeler/api/operations.html">Operations</a></li>
352<li class="toctree-l3"><a class="reference internal" href="table-remodeler/api/cli.html">Command-line interface</a></li>
353</ul>
354</li>
355</ul>
356</li>
357<li class="toctree-l1 has-children"><a class="reference internal" href="hed-mcp/index.html">HED MCP server</a><input aria-label="Toggle navigation of HED MCP server" class="toctree-checkbox" id="toctree-checkbox-14" name="toctree-checkbox-14" role="switch" type="checkbox"/><label for="toctree-checkbox-14"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
358<li class="toctree-l2"><a class="reference internal" href="hed-mcp/EXAMPLES.html">Usage</a></li>
359<li class="toctree-l2"><a class="reference internal" href="hed-mcp/API.html">MCP API</a></li>
360</ul>
361</li>
362<li class="toctree-l1 has-children"><a class="reference internal" href="hed-vis/index.html">HED visualization tools</a>
362<input aria-label="Toggle navigation of HED visualization tools" class="toctree-checkbox" id="toctree-checkbox-15" name="toctree-checkbox-15" role="switch" type="checkbox"/><label for="toctree-checkbox-15"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
363<li class="toctree-l2"><a class="reference internal" href="hed-vis/user_guide.html">Visualization guide</a></li>
364<li class="toctree-l2 has-children"><a class="reference internal" href="hed-vis/api/index.html">Visualization API</a><input aria-label="Toggle navigation of Visualization API" class="toctree-checkbox" id="toctree-checkbox-16" name="toctree-checkbox-16" role="switch" type="checkbox"/><label for="toctree-checkbox-16"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
365<li class="toctree-l3"><a class="reference internal" href="hed-vis/api/core.html">Core API</a></li>
366<li class="toctree-l3"><a class="reference internal" href="hed-vis/api/generators.html">Word cloud generators</a></li>
367<li class="toctree-l3"><a class="reference internal" href="hed-vis/api/visualization_config.html">hedvis configuration classes</a></li>
368</ul>
369</li>
370</ul>
371</li>
372<li class="toctree-l1 has-children"><a class="reference internal" href="CTagger/index.html">CTagger</a><input aria-label="Toggle navigation of CTagger" class="toctree-checkbox" id="toctree-checkbox-17" name="toctree-checkbox-17" role="switch" type="checkbox"/><label for="toctree-checkbox-17"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
373<li class="toctree-l2"><a class="reference internal" href="CTagger/user_guide.html">User guide</a></li>
374<li class="toctree-l2"><a class="reference internal" href="CTagger/ctagger_in_eeglab.html">CTagger in EEGLAB</a></li>
375</ul>
376</li>
377<li class="toctree-l1"><a class="reference internal" href="HedVsCode.html">HED VSCode extension</a></li>
378</ul>
379<p class="caption" role="heading"><span class="caption-text">Other resources:</span></p>
380<ul>
381<li class="toctree-l1 has-children"><a class="reference internal" href="hed-specification/index.html">HED specification</a><input aria-label="Toggle navigation of HED specification" class="toctree-checkbox" id="toctree-checkbox-18" name="toctree-checkbox-18" role="switch" type="checkbox"/><label for="toctree-checkbox-18"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
382<li class="toctree-l2"><a class="reference internal" href="hed-specification/01_Introduction.html">1. Introduction to HED</a></li>
383<li class="toctree-l2"><a class="reference internal" href="hed-specification/02_Terminology.html">2. HED terminology</a></li>
384<li class="toctree-l2"><a class="reference internal" href="hed-specification/03_HED_formats.html">3. HED formats</a></li>
385<li class="toctree-l2"><a class="reference internal" href="hed-specification/04_Basic_annotation.html">4. Basic annotation</a></li>
386<li class="toctree-l2"><a class="reference internal" href="hed-specification/05_Advanced_annotation.html">5. Advanced annotation</a></li>
387<li class="toctree-l2"><a class="reference internal" href="hed-specification/06_Infrastructure_and_tools.html">6. Infrastructure and tools</a></li>
388<li class="toctree-l2"><a class="reference internal" href="hed-specification/07_Library_schemas.html">7. Library schemas</a></li>
389<li class="toctree-l2"><a class="reference internal" href="hed-specification/08_HED_ontology.html">8. The HED ontology</a></li>
390<li class="toctree-l2"><a class="reference internal" href="hed-specification/Appendix_A.html">A. Schema format details</a></li>
391<li class="toctree-l2"><a class="reference internal" href="hed-specification/Appendix_B.html">B. HED errors</a></li>
392</ul>
393</li>
394<li class="toctree-l1 has-children"><a class="reference internal" href="hed-task/index.html">HED task catalog</a><input aria-label="Toggle navigation of HED task catalog" class="toctree-checkbox" id="toctree-checkbox-19" name="toctree-checkbox-19" role="switch" type="checkbox"/><label for="toctree-checkbox-19"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
395<li class="toctree-l2"><a class="reference internal" href="hed-task/introduction.html">Introduction</a></li>
396<li class="toctree-l2"><a class="reference internal" href="hed-task/how_to_use.html">How to use the Catalog</a></li>
397<li class="toctree-l2 has-children"><a class="reference internal" href="hed-task/tasks/index.html">Tasks</a><input aria-label="Toggle navigation of Tasks" class="toctree-checkbox" id="toctree-checkbox-20" name="toctree-checkbox-20" role="switch" type="checkbox"/><label for="toctree-checkbox-20"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
398<li class="toctree-l3 has-children"><a class="reference internal" href="hed-task/tasks/by_family.html">Tasks by paradigm family</a>
398<input aria-label="Toggle navigation of Tasks by paradigm family" class="toctree-checkbox" id="toctree-checkbox-21" name="toctree-checkbox-21" role="switch" type="checkbox"/><label for="toctree-checkbox-21"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
399<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/conflict_and_interference.html">Conflict and interference</a><input aria-label="Toggle navigation of Conflict and interference" class="toctree-checkbox" id="toctree-checkbox-22" name="toctree-checkbox-22" role="switch" type="checkbox"/><label for="toctree-checkbox-22"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
400<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_emotional_stroop.html">Emotional Stroop</a></li>
401<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_eriksen_flanker.html">Eriksen Flanker</a></li>
402<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_imitation_inhibition.html">Imitation-Inhibition</a></li>
403<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_implicit_association.html">Implicit Association</a></li>
404<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_navon.html">Navon</a></li>
405<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_simon.html">Simon</a></li>
406<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_stroop_color_word.html">Stroop Color-Word</a></li>
407<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_weapons_identification.html">Weapons Identification</a></li>
408</ul>
409</li>
410<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/response_inhibition.html">Response inhibition and stopping</a><input aria-label="Toggle navigation of Response inhibition and stopping" class="toctree-checkbox" id="toctree-checkbox-23" name="toctree-checkbox-23" role="switch" type="checkbox"/><label for="toctree-checkbox-23"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
411<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_anti_saccade.html">Anti-Saccade</a></li>
412<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_go_no_go.html">Go/No-Go</a></li>
413<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_stop_signal.html">Stop-Signal</a></li>
414<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_sustained_attention_to_response.html">Sustained Attention to Response</a></li>
415</ul>
416</li>
417<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/attentional_cueing.html">Attentional cueing and orienting</a><input aria-label="Toggle navigation of Attentional cueing and orienting" class="toctree-checkbox" id="toctree-checkbox-24" name="toctree-checkbox-24" role="switch" type="checkbox"/><label for="toctree-checkbox-24"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
418<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_attention_network.html">Attention Network</a></li>
419<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_dot_probe.html">Dot-Probe</a></li>
420<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_posner_spatial_cueing.html">Posner Spatial Cueing</a></li>
421</ul>
422</li>
423<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/visual_search_and_tracking.html">Visual search and tracking</a><input aria-label="Toggle navigation of Visual search and tracking" class="toctree-checkbox" id="toctree-checkbox-25" name="toctree-checkbox-25" role="switch" type="checkbox"/><label for="toctree-checkbox-25"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
424<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_contextual_cueing.html">Contextual Cueing</a></li>
425<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_multiple_object_tracking.html">Multiple Object Tracking</a></li>
426<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_useful_field_of_view.html">Useful Field of View</a></li>
427<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_visual_search.html">Visual Search</a></li>
428</ul>
429</li>
430<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/oddball_and_vigilance.html">Oddball, vigilance and continuous performance</a><input aria-label="Toggle navigation of Oddball, vigilance and continuous performance" class="toctree-checkbox" id="toctree-checkbox-26" name="toctree-checkbox-26" role="switch" type="checkbox"/><label for="toctree-checkbox-26"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
431<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_continuous_performance.html">Continuous Performance</a></li>
432<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_mismatch_negativity.html">Mismatch Negativity</a></li>
433<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_oddball.html">Oddball</a></li>
434<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_psychomotor_vigilance.html">Psychomotor Vigilance</a></li>
435<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_rapid_serial_visual_presentation.html">Rapid Serial Visual Presentation</a></li>
436</ul>
437</li>
438<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/perceptual_judgment.html">Perceptual judgment and psychophysics</a><input aria-label="Toggle navigation of Perceptual judgment and psychophysics" class="toctree-checkbox" id="toctree-checkbox-27" name="toctree-checkbox-27" role="switch" type="checkbox"/><label for="toctree-checkbox-27"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
439<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_auditory_masking.html">Auditory Masking</a></li>
440<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_biological_motion_perception.html">Biological Motion Perception</a></li>
441<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_face_processing.html">Face Processing</a></li>
442<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_random_dot_kinematogram.html">Random Dot Kinematogram</a></li>
443<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_visual_masking.html">Visual Masking</a></li>
444</ul>
445</li>
446<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/working_memory_span.html">Short-term and working memory</a>
446<input aria-label="Toggle navigation of Short-term and working memory" class="toctree-checkbox" id="toctree-checkbox-28" name="toctree-checkbox-28" role="switch" type="checkbox"/><label for="toctree-checkbox-28"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
447<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_change_detection.html">Change Detection</a></li>
448<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_corsi_block_tapping.html">Corsi Block-Tapping</a></li>
449<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_delayed_match_to_sample.html">Delayed Match-to-Sample</a></li>
450<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_digit_span.html">Digit Span</a></li>
451<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_n_back.html">N-Back</a></li>
452<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_operation_span.html">Operation Span</a></li>
453<li class="toctree-l5">
453<a class="reference internal" href="hed-task/tasks/hedtsk_sternberg_item_recognition.html">Sternberg Item Recognition</a></li>
454</ul>
455</li>
456<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/recall_and_recognition.html">Recall and recognition memory</a><input aria-label="Toggle navigation of Recall and recognition memory" class="toctree-checkbox" id="toctree-checkbox-29" name="toctree-checkbox-29" role="switch" type="checkbox"/><label for="toctree-checkbox-29"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
457<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_autobiographical_memory.html">Autobiographical Memory</a></li>
458<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_cambridge_face_memory.html">Cambridge Face Memory</a></li>
459<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_free_recall.html">Free Recall</a></li>
460<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_mnemonic_similarity.html">Mnemonic Similarity</a></li>
461<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_old_new_recognition_memory.html">Old/New Recognition Memory</a></li>
462<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_paired_associates_learning.html">Paired Associates Learning</a></li>
463<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_remember_know.html">Remember/Know</a></li>
464<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_rey_auditory_verbal_learning.html">Rey Auditory Verbal Learning</a></li>
465<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_source_memory.html">Source Memory</a></li>
466</ul>
467</li>
468<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/memory_control.html">Memory control and prospective memory</a><input aria-label="Toggle navigation of Memory control and prospective memory" class="toctree-checkbox" id="toctree-checkbox-30" name="toctree-checkbox-30" role="switch" type="checkbox"/><label for="toctree-checkbox-30"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
469<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_directed_forgetting.html">Directed Forgetting</a></li>
470<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_prospective_memory.html">Prospective Memory</a></li>
471<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_self_referential_encoding.html">Self-Referential Encoding</a></li>
472<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_think_no_think.html">Think/No-Think</a></li>
473</ul>
474</li>
475<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/metacognition_and_interoception.html">Metacognition, agency and interoception</a><input aria-label="Toggle navigation of Metacognition, agency and interoception" class="toctree-checkbox" id="toctree-checkbox-31" name="toctree-checkbox-31" role="switch" type="checkbox"/><label for="toctree-checkbox-31"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
476<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_body_ownership_illusion.html">Body Ownership Illusion</a></li>
477<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_feeling_of_knowing.html">Feeling-of-Knowing</a></li>
478<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_heartbeat_detection.html">Heartbeat Detection</a></li>
479<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_intentional_binding.html">Intentional Binding</a></li>
480<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_judgment_of_learning.html">Judgment-of-Learning</a></li>
481</ul>
482</li>
483<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/conditioning_and_reinforcement.html">
483Conditioning, reinforcement and implicit learning</a><input aria-label="Toggle navigation of Conditioning, reinforcement and implicit learning" class="toctree-checkbox" id="toctree-checkbox-32" name="toctree-checkbox-32" role="switch" type="checkbox"/><label for="toctree-checkbox-32"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
484<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_artificial_grammar_learning.html">Artificial Grammar Learning</a></li>
485<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_causal_learning.html">Causal Learning</a></li>
486<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_instrumental_conditioning.html">Instrumental Conditioning</a></li>
487<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_multi_armed_bandit.html">Multi-Armed Bandit</a></li>
488<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_pavlovian_fear_conditioning.html">Pavlovian Fear Conditioning</a></li>
489<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_probabilistic_classification_learning.html">Probabilistic Classification Learning</a></li>
490<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_probabilistic_selection.html">Probabilistic Selection</a></li>
491<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_reversal_learning.html">Reversal Learning</a></li>
492<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_serial_reaction_time.html">Serial Reaction Time</a></li>
493<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_two_stage_decision.html">Two-Stage Decision</a></li>
494</ul>
495</li>
496<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/motor_performance.html">Motor performance and speeded response</a><input aria-label="Toggle navigation of Motor performance and speeded response" class="toctree-checkbox" id="toctree-checkbox-33" name="toctree-checkbox-33" role="switch" type="checkbox"/><label for="toctree-checkbox-33"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
497<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_digit_symbol_substitution.html">Digit Symbol Substitution</a></li>
498<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_finger_tapping.html">Finger Tapping</a></li>
499<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_mirror_tracing.html">Mirror Tracing</a></li>
500<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_motor_sequence_learning.html">Motor Sequence Learning</a></li>
501<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_psychological_refractory_period.html">Psychological Refractory Period</a></li>
502</ul>
503</li>
504<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/executive_and_reasoning.html">Rule use, planning and reasoning</a><input aria-label="Toggle navigation of Rule use, planning and reasoning" class="toctree-checkbox" id="toctree-checkbox-34" name="toctree-checkbox-34" role="switch" type="checkbox"/><label for="toctree-checkbox-34"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
505<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_ravens_progressive_matrices.html">Raven's Progressive Matrices</a></li>
506<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_remote_associates.html">Remote Associates</a></li>
507<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_task_switching.html">Task Switching</a></li>
508<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_tower_of_london.html">Tower of London</a></li>
509<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_trail_making.html">Trail Making</a></li>
510<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_wason_selection.html">Wason Selection</a></li>
511<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_wisconsin_card_sorting.html">Wisconsin Card Sorting</a></li>
512</ul>
513</li>
514<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/reward_and_value_choice.html">Reward, risk and value-based choice</a><input aria-label="Toggle navigation of Reward, risk and value-based choice" class="toctree-checkbox" id="toctree-checkbox-35" name="toctree-checkbox-35" role="switch" type="checkbox"/><label for="toctree-checkbox-35"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
515<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_balloon_analog_risk.html">Balloon Analog Risk</a></li>
516<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_delay_discounting.html">Delay Discounting</a></li>
517<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_effort_based_decision_making.html">Effort-Based Decision-Making</a></li>
518<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_iowa_gambling.html">Iowa Gambling</a></li>
519<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_monetary_incentive_delay.html">Monetary Incentive Delay</a></li>
520<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_social_incentive_delay.html">Social Incentive Delay</a></li>
521</ul>
522</li>
523<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/social_cognition_and_games.html">Social cognition and social choice</a><input aria-label="Toggle navigation of Social cognition and social choice" class="toctree-checkbox" id="toctree-checkbox-36" name="toctree-checkbox-36" role="switch" type="checkbox"/><label for="toctree-checkbox-36"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
524<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_dictator_game.html">Dictator Game</a></li>
525<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_false_belief.html">False Belief</a></li>
526<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_prisoners_dilemma.html">Prisoner's Dilemma</a></li>
527<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_reading_the_mind_in_the_eyes.html">Reading the Mind in the Eyes</a></li>
528<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_trust_game.html">Trust Game</a></li>
529<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_ultimatum_game.html">Ultimatum Game</a></li>
530</ul>
531</li>
532<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/emotion.html">Emotion elicitation and regulation</a><input aria-label="Toggle navigation of Emotion elicitation and regulation" class="toctree-checkbox" id="toctree-checkbox-37" name="toctree-checkbox-37" role="switch" type="checkbox"/><label for="toctree-checkbox-37"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
533<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_affective_picture_viewing.html">Affective Picture Viewing</a></li>
534<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_affective_priming.html">Affective Priming</a></li>
535<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_emotion_regulation.html">Emotion Regulation</a></li>
536<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_facial_emotion_recognition.html">Facial Emotion Recognition</a></li>
537</ul>
538</li>
539<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/language.html">Language comprehension and production</a><input aria-label="Toggle navigation of Language comprehension and production" class="toctree-checkbox" id="toctree-checkbox-38" name="toctree-checkbox-38" role="switch" type="checkbox"/><label for="toctree-checkbox-38"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
540<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_lexical_decision.html">Lexical Decision</a></li>
541<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_phonological_awareness.html">Phonological Awareness</a></li>
542<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_picture_naming.html">Picture Naming</a></li>
543<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_self_paced_reading.html">Self-Paced Reading</a></li>
544<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_semantic_priming.html">Semantic Priming</a></li>
545<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_sentence_comprehension.html">Sentence Comprehension</a></li>
546<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_verb_generation.html">Verb Generation</a></li>
547<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_verbal_fluency.html">Verbal Fluency</a></li>
548</ul>
549</li>
550<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/spatial_navigation.html">Spatial cognition and navigation</a><input aria-label="Toggle navigation of Spatial cognition and navigation" class="toctree-checkbox" id="toctree-checkbox-39" name="toctree-checkbox-39" role="switch" type="checkbox"/><label for="toctree-checkbox-39"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
551<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_mental_rotation.html">Mental Rotation</a></li>
552<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_virtual_morris_water_maze.html">Virtual Morris Water Maze</a></li>
553<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_virtual_radial_arm_maze.html">Virtual Radial Arm Maze</a></li>
554</ul>
555</li>
556<li class="toctree-l4 has-children"><a class="reference internal" href="hed-task/tasks/families/pseudo_tasks.html">Pseudo tasks: rest, fixation and self-report blocks</a><input aria-label="Toggle navigation of Pseudo tasks: rest, fixation and self-report blocks" class="toctree-checkbox" id="toctree-checkbox-40" name="toctree-checkbox-40" role="switch" type="checkbox"/><label for="toctree-checkbox-40"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
557<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_fixate.html">Fixate</a></li>
558<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_rest.html">Rest</a></li>
559<li class="toctree-l5"><a class="reference internal" href="hed-task/tasks/hedtsk_take_questionnaire.html">Take Questionnaire</a></li>
560</ul>
561</li>
562</ul>
563</li>
564<li class="toctree-l3 has-children"><a class="reference internal" href="hed-task/tasks/alphabetically.html">Tasks alphabetically</a>
564<input aria-label="Toggle navigation of Tasks alphabetically" class="toctree-checkbox" id="toctree-checkbox-41" name="toctree-checkbox-41" role="switch" type="checkbox"/><label for="toctree-checkbox-41"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
565<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_affective_picture_viewing.html">Affective Picture Viewing</a></li>
566<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_affective_priming.html">Affective Priming</a></li>
567<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_anti_saccade.html">Anti-Saccade</a></li>
568<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_artificial_grammar_learning.html">Artificial Grammar Learning</a></li>
569<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_attention_network.html">Attention Network</a></li>
570<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_auditory_masking.html">Auditory Masking</a></li>
571<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_autobiographical_memory.html">Autobiographical Memory</a></li>
572<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_balloon_analog_risk.html">Balloon Analog Risk</a></li>
573<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_biological_motion_perception.html">Biological Motion Perception</a></li>
574<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_body_ownership_illusion.html">Body Ownership Illusion</a></li>
575<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_cambridge_face_memory.html">Cambridge Face Memory</a></li>
576<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_causal_learning.html">Causal Learning</a></li>
577<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_change_detection.html">Change Detection</a></li>
578<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_contextual_cueing.html">Contextual Cueing</a></li>
579<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_continuous_performance.html">Continuous Performance</a></li>
580<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_corsi_block_tapping.html">Corsi Block-Tapping</a></li>
581<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_delay_discounting.html">Delay Discounting</a></li>
582<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_delayed_match_to_sample.html">Delayed Match-to-Sample</a></li>
583<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_dictator_game.html">Dictator Game</a></li>
584<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_digit_span.html">Digit Span</a></li>
585<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_digit_symbol_substitution.html">Digit Symbol Substitution</a></li>
586<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_directed_forgetting.html">Directed Forgetting</a></li>
587<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_dot_probe.html">Dot-Probe</a></li>
588<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_effort_based_decision_making.html">Effort-Based Decision-Making</a></li>
589<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_emotion_regulation.html">Emotion Regulation</a></li>
590<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_emotional_stroop.html">Emotional Stroop</a></li>
591<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_eriksen_flanker.html">Eriksen Flanker</a></li>
592<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_face_processing.html">Face Processing</a></li>
593<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_facial_emotion_recognition.html">Facial Emotion Recognition</a></li>
594<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_false_belief.html">False Belief</a></li>
595<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_feeling_of_knowing.html">Feeling-of-Knowing</a></li>
596<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_finger_tapping.html">Finger Tapping</a></li>
597<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_fixate.html">Fixate</a></li>
598<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_free_recall.html">Free Recall</a></li>
599<li class="toctree-l4">
599<a class="reference internal" href="hed-task/tasks/hedtsk_go_no_go.html">Go/No-Go</a></li>
600<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_heartbeat_detection.html">Heartbeat Detection</a></li>
601<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_imitation_inhibition.html">Imitation-Inhibition</a></li>
602<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_implicit_association.html">Implicit Association</a></li>
603<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_instrumental_conditioning.html">Instrumental Conditioning</a></li>
604<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_intentional_binding.html">Intentional Binding</a></li>
605<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_iowa_gambling.html">Iowa Gambling</a></li>
606<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_judgment_of_learning.html">Judgment-of-Learning</a></li>
607<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_lexical_decision.html">Lexical Decision</a></li>
608<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_mental_rotation.html">Mental Rotation</a></li>
609<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_mirror_tracing.html">Mirror Tracing</a></li>
610<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_mismatch_negativity.html">Mismatch Negativity</a></li>
611<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_mnemonic_similarity.html">Mnemonic Similarity</a></li>
612<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_monetary_incentive_delay.html">Monetary Incentive Delay</a></li>
613<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_motor_sequence_learning.html">Motor Sequence Learning</a></li>
614<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_multi_armed_bandit.html">Multi-Armed Bandit</a></li>
615<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_multiple_object_tracking.html">Multiple Object Tracking</a></li>
616<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_n_back.html">N-Back</a></li>
617<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_navon.html">Navon</a></li>
618<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_oddball.html">Oddball</a></li>
619<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_old_new_recognition_memory.html">Old/New Recognition Memory</a></li>
620<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_operation_span.html">Operation Span</a></li>
621<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_paired_associates_learning.html">Paired Associates Learning</a></li>
622<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_pavlovian_fear_conditioning.html">Pavlovian Fear Conditioning</a></li>
623<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_phonological_awareness.html">Phonological Awareness</a></li>
624<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_picture_naming.html">Picture Naming</a></li>
625<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_posner_spatial_cueing.html">Posner Spatial Cueing</a></li>
626<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_prisoners_dilemma.html">Prisoner's Dilemma</a></li>
627<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_probabilistic_classification_learning.html">Probabilistic Classification Learning</a></li>
628<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_probabilistic_selection.html">Probabilistic Selection</a></li>
629<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_prospective_memory.html">Prospective Memory</a></li>
630<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_psychological_refractory_period.html">Psychological Refractory Period</a></li>
631<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_psychomotor_vigilance.html">Psychomotor Vigilance</a></li>
632<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_random_dot_kinematogram.html">Random Dot Kinematogram</a></li>
633<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_rapid_serial_visual_presentation.html">Rapid Serial Visual Presentation</a></li>
634<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_ravens_progressive_matrices.html">Raven's Progressive Matrices</a></li>
635<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_reading_the_mind_in_the_eyes.html">Reading the Mind in the Eyes</a></li>
636<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_remember_know.html">Remember/Know</a></li>
637<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_remote_associates.html">Remote Associates</a></li>
638<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_rest.html">Rest</a></li>
639<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_reversal_learning.html">Reversal Learning</a></li>
640<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_rey_auditory_verbal_learning.html">Rey Auditory Verbal Learning</a></li>
641<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_self_paced_reading.html">Self-Paced Reading</a></li>
642<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_self_referential_encoding.html">Self-Referential Encoding</a></li>
643<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_semantic_priming.html">Semantic Priming</a></li>
644<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_sentence_comprehension.html">Sentence Comprehension</a></li>
645<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_serial_reaction_time.html">Serial Reaction Time</a></li>
646<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_simon.html">Simon</a></li>
647<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_social_incentive_delay.html">Social Incentive Delay</a></li>
648<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_source_memory.html">Source Memory</a></li>
649<li class="toctree-l4">
649<a class="reference internal" href="hed-task/tasks/hedtsk_sternberg_item_recognition.html">Sternberg Item Recognition</a></li>
650<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_stop_signal.html">Stop-Signal</a></li>
651<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_stroop_color_word.html">Stroop Color-Word</a></li>
652<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_sustained_attention_to_response.html">Sustained Attention to Response</a></li>
653<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_take_questionnaire.html">Take Questionnaire</a></li>
654<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_task_switching.html">Task Switching</a></li>
655<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_think_no_think.html">Think/No-Think</a></li>
656<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_tower_of_london.html">Tower of London</a></li>
657<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_trail_making.html">Trail Making</a></li>
658<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_trust_game.html">Trust Game</a></li>
659<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_two_stage_decision.html">Two-Stage Decision</a></li>
660<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_ultimatum_game.html">Ultimatum Game</a></li>
661<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_useful_field_of_view.html">Useful Field of View</a></li>
662<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_verb_generation.html">Verb Generation</a></li>
663<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_verbal_fluency.html">Verbal Fluency</a></li>
664<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_virtual_morris_water_maze.html">Virtual Morris Water Maze</a></li>
665<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_virtual_radial_arm_maze.html">Virtual Radial Arm Maze</a></li>
666<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_visual_masking.html">Visual Masking</a></li>
667<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_visual_search.html">Visual Search</a></li>
668<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_wason_selection.html">Wason Selection</a></li>
669<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_weapons_identification.html">Weapons Identification</a></li>
670<li class="toctree-l4"><a class="reference internal" href="hed-task/tasks/hedtsk_wisconsin_card_sorting.html">Wisconsin Card Sorting</a></li>
671</ul>
672</li>
673</ul>
674</li>
675<li class="toctree-l2 has-children"><a class="reference internal" href="hed-task/processes/index.html">Cognitive processes</a><input aria-label="Toggle navigation of Cognitive processes" class="toctree-checkbox" id="toctree-checkbox-42" name="toctree-checkbox-42" role="switch" type="checkbox"/><label for="toctree-checkbox-42"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
676<li class="toctree-l3 has-children"><a class="reference internal" href="hed-task/processes/by_category.html">Processes by category</a><input aria-label="Toggle navigation of Processes by category" class="toctree-checkbox" id="toctree-checkbox-43" name="toctree-checkbox-43" role="switch" type="checkbox"/><label for="toctree-checkbox-43"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
677<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/associative_learning_and_reinforcement.html">Associative Learning and Reinforcement</a></li>
678<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/auditory_and_pre_attentive_deviance_processing.html">Auditory and Pre-Attentive Deviance Processing</a></li>
679<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/awareness_agency_and_metacognition.html">Awareness, Agency, and Metacognition</a></li>
680<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/cognitive_flexibility_and_higher_order_executive_function.html">Cognitive Flexibility and Higher-Order Executive Function</a></li>
681<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/emotion_perception_and_regulation.html">Emotion Perception and Regulation</a></li>
682<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/face_and_object_perception.html">Face and Object Perception</a></li>
683<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/implicit_and_statistical_learning.html">Implicit and Statistical Learning</a></li>
684<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/inhibitory_control_and_conflict_monitoring.html">Inhibitory Control and Conflict Monitoring</a></li>
685<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/language_comprehension_and_production.html">Language Comprehension and Production</a></li>
686<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/long_term_memory.html">Long-Term Memory</a></li>
687<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/motor_preparation_timing_and_execution.html">Motor Preparation, Timing, and Execution</a></li>
688<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/perceptual_decision_making_evidence_accumulation.html">Perceptual Decision-Making (Evidence Accumulation)</a></li>
689<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/reasoning_and_problem_solving.html">Reasoning and Problem-Solving</a></li>
690<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/reward_anticipation_and_motivation.html">Reward Anticipation and Motivation</a></li>
691<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/selective_and_sustained_attention.html">Selective and Sustained Attention</a></li>
692<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/short_term_and_working_memory.html">Short-Term and Working Memory</a></li>
693<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/social_cognition_and_strategic_social_choice.html">Social Cognition and Strategic Social Choice</a></li>
694<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/spatial_cognition_and_navigation.html">Spatial Cognition and Navigation</a></li>
695<li class="toctree-l4"><a class="reference internal" href="hed-task/processes/value_based_decision_making_under_risk_and_uncertainty.html">Value-Based Decision-Making Under Risk and Uncertainty</a></li>
696</ul>
697</li>
698<li class="toctree-l3"><a class="reference internal" href="hed-task/processes/alphabetically.html">Processes alphabetically</a></li>
699</ul>
700</li>
701<li class="toctree-l2"><a class="reference internal" href="hed-task/crossref.html">Task-process links</a></li>
702<li class="toctree-l2 has-children"><a class="reference internal" href="hed-task/methods/task_criteria/index.html">Task criteria</a>
702<input aria-label="Toggle navigation of Task criteria" class="toctree-checkbox" id="toctree-checkbox-44" name="toctree-checkbox-44" role="switch" type="checkbox"/><label for="toctree-checkbox-44"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
703<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/task_criteria/01_task_selection_criteria.html">1. Task selection criteria</a></li>
704<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/task_criteria/02_task_naming_rules.html">2. Task naming rules</a></li>
705<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/task_criteria/03_the_task_inclusion_test.html">3. The task inclusion test</a></li>
706<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/task_criteria/04_variation_criteria.html">4. Variation criteria</a></li>
707<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/task_criteria/05_borderline_case_policy.html">5. Borderline case policy</a></li>
708</ul>
709</li>
710<li class="toctree-l2 has-children"><a class="reference internal" href="hed-task/methods/process_criteria/index.html">Process criteria</a><input aria-label="Toggle navigation of Process criteria" class="toctree-checkbox" id="toctree-checkbox-45" name="toctree-checkbox-45" role="switch" type="checkbox"/><label for="toctree-checkbox-45"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
711<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/process_criteria/01_process_selection_criteria.html">1. Process selection criteria</a></li>
712<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/process_criteria/02_process_naming_rules.html">2. Process naming rules</a></li>
713<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/process_criteria/03_definition_standards.html">3. Process definition standards</a></li>
714<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/process_criteria/04_category_rules.html">4. Process category rules</a></li>
715<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/process_criteria/05_reference_standards.html">5. Process reference standards</a></li>
716<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/process_criteria/06_task_linkage_rules.html">6. Task linkage rules</a></li>
717</ul>
718</li>
719<li class="toctree-l2 has-children"><a class="reference internal" href="hed-task/methods/atlas_mapping/index.html">Mapping to Cognitive Atlas</a><input aria-label="Toggle navigation of Mapping to Cognitive Atlas" class="toctree-checkbox" id="toctree-checkbox-46" name="toctree-checkbox-46" role="switch" type="checkbox"/><label for="toctree-checkbox-46"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
720<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/atlas_mapping/01_source_data_and_match_types.html">1. Source data and match types</a></li>
721<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/atlas_mapping/02_task_coverage.html">2. Task coverage</a></li>
722<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/atlas_mapping/03_process_coverage.html">3. Process coverage</a></li>
723<li class="toctree-l3"><a class="reference internal" href="hed-task/methods/atlas_mapping/04_verification_and_reproduction.html">4. Verification and reproduction</a></li>
724</ul>
725</li>
726<li class="toctree-l2"><a class="reference internal" href="hed-task/atlas/cognitive_atlas.html">What is in the Cognitive Atlas</a></li>
727<li class="toctree-l2"><a class="reference internal" href="hed-task/atlas/relationship.html">The Catalog and the Cognitive Atlas</a></li>
728<li class="toctree-l2"><a class="reference internal" href="hed-task/atlas/task_mapping.html">Task mapping tables</a></li>
729<li class="toctree-l2"><a class="reference internal" href="hed-task/atlas/process_mapping.html">Process mapping tables</a></li>
730</ul>
731</li>
732<li class="toctree-l1"><a class="reference internal" href="DocumentationSummary.html">Documentation summary</a></li>
733<li class="toctree-l1"><a class="reference internal" href="UnderstandingHedVersions.html">Understanding HED versions</a></li>
734<li class="toctree-l1"><a class="reference internal" href="HedHistory.html">Brief history of HED</a></li>
735<li class="toctree-l1"><a class="reference internal" href="HedGovernance.html">HED governance</a></li>
736</ul>
737<p class="caption" role="heading"><span class="caption-text">Data resources:</span></p>
738<ul>
739<li class="toctree-l1 has-children"><a class="reference internal" href="hed-tests/index.html">HED JSON tests</a>
739<input aria-label="Toggle navigation of HED JSON tests" class="toctree-checkbox" id="toctree-checkbox-47" name="toctree-checkbox-47" role="switch" type="checkbox"/><label for="toctree-checkbox-47"><span class="icon"><svg><use href="#svg-arrow-right"></use></svg></span></label><ul>
740<li class="toctree-l2"><a class="reference internal" href="hed-tests/user_guide.html">User guide</a></li>
741<li class="toctree-l2"><a class="reference internal" href="hed-tests/test_coverage.html">Test coverage report</a></li>
742<li class="toctree-l2"><a class="reference internal" href="hed-tests/test_index.html">Test index</a></li>
743</ul>
744</li>
745<li class="toctree-l1"><a class="reference internal" href="HedTestDatasets.html">HED test datasets</a></li>
746</ul>
747
748</div><div class="sidebar-quicklinks">
749    <h3>Quick links</h3>
750    <ul>
751        <li><a href="https://www.hedtags.org/" target="_blank">HED homepage</a></li>
752        <li><a href="https://www.hedtags.org/hed-schema-browser" target="_blank">HED schema browser</a></li>
753        <li><a href="https://www.hedtags.org/hed-specification" target="_blank">HED specification</a></li>
754        <li><a href="https://www.hedtags.org/hed-task" target="_blank">HED task catalog</a></li>
755        <li><a href="https://hedtools.org/hed" target="_blank">HED online tools</a></li>
756        <li><a href="https://www.hedtags.org/hed-web" target="_blank">HED browser tools</a></li>
757    </ul>
758</div>
759</div>
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796        <article role="main" id="furo-main-content">
797          <section id="introduction-to-hed">
798<span id="introduction-to-hed-anchor"></span><h1>Introduction to HED<a class="headerlink" href="#introduction-to-hed" title="Link to this heading">¶</a></h1>
799<p><strong>HED (Hierarchical Event Descriptors)</strong> is a framework for annotating events in time-series data using a structured vocabulary. HED can also be used to annotate static information such as participant characteristics. If you’re working with EEG, fMRI, or other neuroimaging or behavioral data, HED helps you describe <em>what happened</em> during your experiment in a way that computers can understand and process.</p>
800<section id="what-youll-learn">
801<h2>What you’ll learn<a class="headerlink" href="#what-youll-learn" title="Link to this heading">¶</a></h2>
802<ul class="simple">
803<li><p>What HED tags are and how they group into meaningful annotations</p></li>
804<li><p>How short-form tags map to long-form schema paths</p></li>
805<li><p>Where to start if you are new to HED or using BIDS/NWB</p></li>
806</ul>
807</section>
808<section id="why-use-hed">
809<h2>Why use HED?<a class="headerlink" href="#why-use-hed" title="Link to this heading">¶</a></h2>
810<div class="attention admonition">
811<p class="admonition-title"><strong>Traditional event annotation problems</strong></p>
812<ul class="simple">
813<li><p>
813Event codes like “1”, “2”, “stimulus_onset” tell you little about what actually happened</p></li>
814<li><p>Different studies use different terminology for the same events</p></li>
815<li><p>Impossible to search across datasets or compare experiments automatically</p></li>
816<li><p>Manual interpretation required for every analysis</p></li>
817</ul>
818</div>
819<div class="tip admonition">
820<p class="admonition-title"><strong>HED solutions</strong></p>
821<ul class="simple">
822<li><p><strong>Standardized vocabulary</strong>: Everyone uses the same terms for the same concepts</p></li>
823<li><p><strong>Machine-actionable</strong>: Computers can automatically find and analyze events</p></li>
824<li><p><strong>Reversible</strong>: Good HED annotations can be translated to plain English and vice versa</p></li>
825<li><p><strong>Cross-study analysis</strong>: Allows analysts to compare and combine data from different experiments</p></li>
826<li><p><strong>BIDS integration</strong>: Works seamlessly with Brain Imaging Data Structure (<a class="reference external" href="https://bids.neuroimaging.io/index.html">BIDS</a>)</p></li>
827<li><p><strong>NWB integration</strong>: Works seamlessly with Neurodata Without Borders (<a class="reference external" href="https://nwb.org/">NWB</a>)</p></li>
828</ul>
829</div>
830<section id="machine-interpretable-annotations">
831<h3>Machine interpretable annotations<a class="headerlink" href="#machine-interpretable-annotations" title="Link to this heading">¶</a></h3>
832<p>Instead of cryptic event codes, HED lets you describe events in plain, structured language:</p>
833<div class="admonition-example-traditional-event-encoding-vs-simple-hed-annotation admonition">
834<p class="admonition-title"><strong>Example:</strong> Traditional event encoding vs simple HED annotation</p>
835<p><strong>Traditional event marker:</strong> <code class="docutils literal notranslate"><span class="pre">stimulus_type:</span> <span class="pre">3</span></code></p>
836<p><strong>HED annotation:</strong> <code class="docutils literal notranslate"><span class="pre">Sensory-event,</span> <span class="pre">Experimental-stimulus,</span> <span class="pre">Visual-presentation,</span> <span class="pre">(Image,</span> <span class="pre">Face)</span></code></p>
837</div>
838<p><strong>Interpretation:</strong> An experimental stimulus consisting of an image of a face is presented visually [to a single experiment participant on a computer screen] at the time associated with this annotation.</p>
839<p>The portion of the interpretation in square brackets is implied because it has not been annotated to the contrary. The bracketed text is explanatory only and is <strong>not</strong> part of a HED annotation. See <a class="reference internal" href="HedAnnotationSemantics.html"><span class="std std-doc">Making HED meaningful</span></a> for more detail.</p>
840</section>
841<section id="meaningful-across-experiments">
842<h3>Meaningful across experiments<a class="headerlink" href="#meaningful-across-experiments" title="Link to this heading">¶</a></h3>
843<ul class="simple">
844<li><p><strong>Before HED</strong>: “Event code 3 occurred” → Meaningless without documentation</p></li>
845<li><p><strong>After HED</strong>: “Visual presentation of a face image as experimental stimulus” → Self-explanatory and searchable</p></li>
846</ul>
847</section>
848<section id="standardized-vocabulary">
849<h3>Standardized vocabulary<a class="headerlink" href="#standardized-vocabulary" title="Link to this heading">¶</a></h3>
850<p>You can only use terms from the HED vocabulary (<strong>HED schemas</strong>). A HED <strong>standard schema</strong> contains terms generally applicable to all data. Various <strong>HED library schemas</strong> have also been developed for specialized terms in various research fields. These terms have been reviewed and agreed upon by groups of interested researchers. HED is an endorsed standard of the <a class="reference external" href="https://www.incf.org/">INCF</a>.</p>
851</section>
852</section>
853<section id="key-hed-concepts">
854<h2>Key HED concepts<a class="headerlink" href="#key-hed-concepts" title="Link to this heading">¶</a></h2>
855<p>Before diving into HED annotation, familiarize yourself with these fundamental concepts:</p>
856<details class="sd-sphinx-override sd-dropdown sd-card sd-mb-3">
857<summary class="sd-summary-title sd-card-header sd-bg-primary sd-bg-text-primary">
858<span class="sd-summary-text"><strong>HED schemas - the vocabulary</strong></span><span class="sd-summary-state-marker sd-summary-chevron-right"><svg version="1.1" width="1.5em" height="1.5em" class="sd-octicon sd-octicon-chevron-right" viewBox="0 0 24 24" aria-hidden="true"><path d="M8.72 18.78a.75.75 0 0 1 0-1.06L14.44 12 8.72 6.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018l6.25 6.25a.75.75 0 0 1 0 1.06l-6.25 6.25a.75.75 0 0 1-1.06 0Z"></path></svg></span></summary><div class="sd-summary-content sd-card-body docutils">
859<p class="sd-card-text">
859The HED schema is a structured vocabulary organized as a hierarchy. It is a taxonomy so each child is a more specific version of its parent:</p>
860<ul class="simple">
861<li><p class="sd-card-text"><strong>Event</strong> → <strong>Sensory-event</strong></p></li>
862<li><p class="sd-card-text"><strong>Item</strong> → <strong>Object</strong> → <strong>Man-made-object</strong> → <strong>Device</strong> → <strong>Tool</strong></p></li>
863<li><p class="sd-card-text"><strong>Property</strong> → <strong>Sensory-property</strong> → <strong>Sensory-presentation</strong> → <strong>Visual-presentation</strong></p></li>
864<li><p class="sd-card-text"><strong>Item</strong> → <strong>Biological-item</strong> → <strong>Anatomical-item</strong> → <strong>Body-part</strong> → <strong>Head</strong> → <strong>Face</strong></p></li>
865</ul>
866<p class="sd-card-text">You should tag using <strong>short form</strong> (<code class="docutils literal notranslate"><span class="pre">Face</span></code>) and let tools automatically expand to <strong>long form</strong> (<code class="docutils literal notranslate"><span class="pre">Item/Biological-item/Anatomical-item/Body-part/Head/Face</span></code>) for tasks such as searching for all body parts.</p>
867</div>
868</details><details class="sd-sphinx-override sd-dropdown sd-card sd-mb-3">
869<summary class="sd-summary-title sd-card-header sd-bg-info sd-bg-text-info">
870<span class="sd-summary-text"><strong>Tags and grouping</strong></span><span class="sd-summary-state-marker sd-summary-chevron-right"><svg version="1.1" width="1.5em" height="1.5em" class="sd-octicon sd-octicon-chevron-right" viewBox="0 0 24 24" aria-hidden="true"><path d="M8.72 18.78a.75.75 0 0 1 0-1.06L14.44 12 8.72 6.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018l6.25 6.25a.75.75 0 0 1 0 1.06l-6.25 6.25a.75.75 0 0 1-1.06 0Z"></path></svg></span></summary><div class="sd-summary-content sd-card-body docutils">
871<ul class="simple">
872<li><p class="sd-card-text"><strong>Tags</strong>: Individual terms from the HED schema (e.g., <code class="docutils literal notranslate"><span class="pre">Sensory-event</span></code>, <code class="docutils literal notranslate"><span class="pre">Red</span></code>, <code class="docutils literal notranslate"><span class="pre">Onset</span></code>)</p></li>
873<li><p class="sd-card-text"><strong>Groups</strong>: Items associated with their properties (e.g., <code class="docutils literal notranslate"><span class="pre">(Face,</span> <span class="pre">Image)</span></code>)</p></li>
874<li><p class="sd-card-text"><strong>Comma separation</strong>: Separates tags and tag groups</p></li>
875<li><p class="sd-card-text"><strong>Order doesn’t matter</strong>: Parentheses determine relationships, not order</p></li>
876</ul>
877<p class="sd-card-text"><strong>Example:</strong> <code class="docutils literal notranslate"><span class="pre">Sensory-event,</span> <span class="pre">Experimental-stimulus,</span> <span class="pre">Visual-presentation,</span> <span class="pre">(Face,</span> <span class="pre">Image)</span></code></p>
878</div>
879</details><details class="sd-sphinx-override sd-dropdown sd-card sd-mb-3">
880<summary class="sd-summary-title sd-card-header sd-bg-success sd-bg-text-success">
881<span class="sd-summary-text"><strong>Annotation levels</strong></span><span class="sd-summary-state-marker sd-summary-chevron-right"><svg version="1.1" width="1.5em" height="1.5em" class="sd-octicon sd-octicon-chevron-right" viewBox="0 0 24 24" aria-hidden="true"><path d="M8.72 18.78a.75.75 0 0 1 0-1.06L14.44 12 8.72 6.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018l6.25 6.25a.75.75 0 0 1 0 1.06l-6.25 6.25a.75.75 0 0 1-1.06 0Z"></path></svg></span></summary><div class="sd-summary-content sd-card-body docutils">
882<ul class="simple">
883<li><p class="sd-card-text"><strong>Basic</strong> describes what happened: <code class="docutils literal notranslate"><span class="pre">Sensory-event,</span> <span class="pre">Visual-presentation,</span> <span class="pre">(Face,</span> <span class="pre">Image)</span></code></p></li>
884<li><p class="sd-card-text"><strong>Detailed</strong> includes experimental context: <code class="docutils literal notranslate"><span class="pre">Experimental-stimulus,</span> <span class="pre">Condition-variable/Famous-face</span></code></p></li>
885<li><p class="sd-card-text"><strong>Advanced</strong> uses definitions and temporal scope for complex experiments</p></li>
886</ul>
887</div>
888</details>
888<details class="sd-sphinx-override sd-dropdown sd-card sd-mb-3">
889<summary class="sd-summary-title sd-card-header sd-bg-warning sd-bg-text-warning">
890<span class="sd-summary-text"><strong>Validation tools</strong></span><span class="sd-summary-state-marker sd-summary-chevron-right"><svg version="1.1" width="1.5em" height="1.5em" class="sd-octicon sd-octicon-chevron-right" viewBox="0 0 24 24" aria-hidden="true"><path d="M8.72 18.78a.75.75 0 0 1 0-1.06L14.44 12 8.72 6.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018l6.25 6.25a.75.75 0 0 1 0 1.06l-6.25 6.25a.75.75 0 0 1-1.06 0Z"></path></svg></span></summary><div class="sd-summary-content sd-card-body docutils">
891<p class="sd-card-text">HED provides tools to check your annotations:</p>
892<ul class="simple">
893<li><p class="sd-card-text"><a class="reference external" href="https://hedtools.org/hed">Online validator</a>: Check syntax and schema compliance</p></li>
894<li><p class="sd-card-text"><a class="reference external" href="https://www.hedtags.org/hed-python">Python</a> and <a class="reference external" href="https://www.hedtags.org/hed-matlab">MATLAB libraries</a> libraries: Integrate validation and analysis into your workflows</p></li>
895<li><p class="sd-card-text"><a class="reference external" href="https://www.hedtags.org/hed-web">Browser validator for HED in BIDS</a>: Automatically checks HED in BIDS datasets</p></li>
896</ul>
897</div>
898</details></section>
899<section id="quick-start">
900<h2>Quick start<a class="headerlink" href="#quick-start" title="Link to this heading">¶</a></h2>
901<p>For quick hands-on learning, start with the tutorials:</p>
902<ul class="simple">
903<li><p><strong>New to HED?</strong> Try the <a class="reference internal" href="HedAnnotationQuickstart.html"><span class="std std-doc">HED annotation quickstart</span></a></p></li>
904<li><p><strong>Have BIDS data?</strong> Follow the <a class="reference internal" href="BidsAnnotationQuickstart.html"><span class="std std-doc">BIDS annotation quickstart</span></a> followed by the <a class="reference internal" href="HedAnnotationQuickstart.html"><span class="std std-doc">HED annotation quickstart</span></a></p></li>
905<li><p><strong>Need practical guidelines?</strong> Read <a class="reference internal" href="HedAnnotationSemantics.html"><span class="std std-doc">Making HED meaningful</span></a></p></li>
906<li><p><strong>View available vocabularies</strong>: <a class="reference external" href="https://www.hedtags.org/hed-schema-browser">HED schema browser</a></p></li>
907</ul>
908</section>
909<section id="next-steps">
910<h2>Next steps<a class="headerlink" href="#next-steps" title="Link to this heading">¶</a></h2>
911<p><strong>Ready to start?</strong> Go to <a class="reference internal" href="HowCanYouUseHed.html"><span class="std std-doc">How can you use HED?</span></a> to find role-specific guidance and workflows tailored to your needs:</p>
912<ul class="simple">
913<li><p><a class="reference internal" href="HowCanYouUseHed.html#as-an-experimenter-anchor"><span class="std std-ref"><strong>🧪 Experimenters</strong></span></a>: Event logging, data collection, and log processing</p></li>
914<li><p><a class="reference internal" href="HowCanYouUseHed.html#as-a-data-annotator-anchor"><span class="std std-ref"><strong>📝 Data annotators</strong></span></a>: BIDS curation, annotation workflows, and quality control</p></li>
915<li><p><a class="reference internal" href="HowCanYouUseHed.html#as-a-data-analyst-anchor"><span class="std std-ref"><strong>📊 Data analysts</strong></span></a>: Search strategies, analysis pipelines, and cross-study methods</p></li>
916<li><p><a class="reference internal" href="HowCanYouUseHed.html#as-a-tool-developer-anchor"><span class="std std-ref"><strong>🛠️ Tool developers</strong></span></a>: API integration, schema handling, and validation frameworks</p></li>
917<li><p><a class="reference internal" href="HowCanYouUseHed.html#as-a-schema-builder-anchor"><span class="std std-ref"><strong>🏗️ Schema builders</strong></span></a>: Vocabulary development, library schemas, and community coordination</p></li>
918</ul>
919</section>
920</section>
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976            <ul>
977<li><a class="reference internal" href="#">Introduction to HED</a><ul>
978<li><a class="reference internal" href="#what-youll-learn">What you’ll learn</a></li>
979<li><a class="reference internal" href="#why-use-hed">Why use HED?</a><ul>
980<li><a class="reference internal" href="#machine-interpretable-annotations">Machine interpretable annotations</a></li>
981<li><a class="reference internal" href="#meaningful-across-experiments">Meaningful across experiments</a></li>
982<li><a class="reference internal" href="#standardized-vocabulary">Standardized vocabulary</a></li>
983</ul>
984</li>
985<li><a class="reference internal" href="#key-hed-concepts">Key HED concepts</a></li>
986<li><a class="reference internal" href="#quick-start">Quick start</a></li>
987<li><a class="reference internal" href="#next-steps">Next steps</a></li>
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