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Add examples for the stimuli-structure
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‎stimuli_structure/README‎

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# Draft Structure for the stimuli directory
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Following the discussions under https://github.com/bids-standard/bids-specification/issues/153 and https://github.com/bids-standard/bids-specification/issues/751, here is a draft structure for the stimuli directory and how it could be integrated into the BIDS data runs.

‎stimuli_structure/dataset_description.json‎

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{
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"Name": "Stimuli structure sample dataset.",
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"License": "CC BY-NC-SA 4.0",
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"Authors": ["Seyed Yahya Shirazi"],
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"EthicsApprovals": ["Both data runs have ethical epproval in their respective experiments."],
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"BIDSVersion": "1.8.0",
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"HEDVersion": "8.2.0"
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}

‎stimuli_structure/participants.json‎

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{
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"participant_id": {
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"Description": "The prticipant ID set in the HBN dataset"
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},
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"sex": {
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"LongName": "Gender",
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"Description": "Gender",
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"Levels": {
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"F": "Female",
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"M": "Male"
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}
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},
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"age": {
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"LongName": "Age",
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"Description": "Age in years"
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}
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}

‎stimuli_structure/participants.tsv‎

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participant_id sex age
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sub-sampleTimeVarying F 7.98
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sub-sampleStillImage M xxx

‎stimuli_structure/stimuli/stim-the-present_annot-LogLumRatio_events.json‎

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{
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"onset": {
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"LongName": "Event onset",
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"Description": "Position (latency) of event marker in seconds relative to the start.",
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"Units": "seconds"
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},
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"duration": {
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"Description": "Duration of the event. For this stimulus, this is the duration of the shot.",
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"Units": "seconds"
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},
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"shot_number": {
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"Description": "Shot sequence number in the movie"
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},
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"LLR": {
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"Description": "Log Luminance Ratio"
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}
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}

‎stimuli_structure/stimuli/stim-the-present_annot-LogLumRatio_events.tsv‎

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onset duration shot_number LLR
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0 n/a video_start video_start
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0 7.25 1 n/a
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7.25 3.542 2 -1.557820733
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10.792 5.208 3 0.3358234903
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16 5 4 -0.03306866929
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21 4.208 5 -0.2070276568
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25.208 9.375 6 0.04327900913
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34.583 0.792 7 -0.1644478802
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35.375 1.333 8 -0.06762669846
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36.708 3.167 9 0.1579466073
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39.875 3.292 10 0.2663627968
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43.167 3.5 11 -0.2664832696
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46.667 2.333 12 0.04315495832
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49 1.917 13 -0.04155285906
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50.917 4.125 14 0.04001208653
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55.042 2.917 15 -0.08485806694
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57.958 2.042 16 0.008346347475
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60 3.958 17 0.02230250862
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63.958 1.458 18 -0.06699408597
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65.417 1.083 19 0.04519596032
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66.5 1.917 20 0.07562682269
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68.417 2.208 21 -0.09718166316
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70.625 4.667 22 0.04645434208
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75.292 1.667 23 0.01865315886
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76.958 0.833 24 0.02023945652
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77.792 1.583 25 -0.01044289204
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79.375 2.292 26 0.07107341152
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81.667 4.5 27 -0.07068154365
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86.167 2.625 28 -0.09355068459
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88.792 2.542 29 0.127618289
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91.333 5.583 30 -0.03570772929
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96.917 4.458 31 0.1251853136
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101.375 3.042 32 -0.1428285775
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104.417 1.25 33 0.0998938008
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105.667 0.792 34 -0.007754262065
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106.458 1.5 35 -0.06120459462
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107.958 0.667 36 -0.02361673076
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108.625 2.208 37 0.01752653383
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110.833 3 38 0.07973702237
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113.833 2.292 39 -0.08752530512
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116.125 1 40 0.05044258775
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117.125 2.25 41 -0.0466125638
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119.375 2.708 42 0.09235464595
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122.083 3.375 43 -0.1067268907
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125.458 6.292 44 0.02212250449
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131.75 4.833 45 0.1053584879
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136.583 3.583 46 -0.06164775268
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140.167 1.708 47 0.001148701321
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141.875 4.292 48 -0.1751332264
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146.167 4.708 49 0.1760542644
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150.875 3.667 50 -0.06821788465
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154.542 2.958 51 0.01782704926
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157.5 3.125 52 -0.0693816018
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160.625 1.833 53 0.0899746917
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162.458 2.792 54 0.09733030527
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165.25 6.667 55 -0.2270603551
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171.917 31.292 56 0.1188704433
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203.208 n/a video_stop video_stop

‎stimuli_structure/stimuli/stimuli.json‎

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{
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"stim_id": {
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"Description": "The stimulus ID included in the stimli directory"
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},
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"type": {
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"Description": "The type of stimulus"
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},
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"nsd_id": {
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"Description": "The Natural Scene ID of the stimulus"
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},
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"coco_id": {
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"Description": "The COCO ID of the stimulus"
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},
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"first_coco_description": {
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"Description": "The first COCO description of the stimulus"
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},
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"HED": {
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"Description": "The HED description of the stimulus"
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}
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}

‎stimuli_structure/stimuli/stimuli.tsv‎

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stim_id type NSD_id COCO_id first_COCO_description HED
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nsd02951.png still_image 2951 262145 "an open market full of people and piles of vegetables." "((Item-count, High), Ingestible-object)), (Background-view, ((Human, Body, Agent-trait/Adult), Outdoors, Furnishing, Natural-feature/Sky, Urban, Man-made-object))"
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the_present_movie.txt video n/a n/a n/a n/a

‎stimuli_structure/sub-sampleTimeVarying/eeg/sub-sampleTimeVarying_task-ThePresent_eeg.json‎

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{
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"InstitutionName": "Child Mind Institute",
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"InstitutionAddress": "101 E 56th St, New York, NY 10022",
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"Manufacturer": "Magtism EGI",
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"ManufacturersModelName": "128-channel GSN 200 v.2.1",
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"PowerLineFrequency": 60,
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"TaskName": "ThePresent",
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"EEGReference": "Cz",
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"RecordingType": "continuous",
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"RecordingDuration": 205.624,
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"SamplingFrequency": 500,
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"SoftwareFilters": "n/a"
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}

‎stimuli_structure/sub-sampleTimeVarying/eeg/sub-sampleTimeVarying_task-ThePresent_eeg.set‎

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