{"success":true,"database":"eegdash","data":{"_id":"6953f4249276ef1ee07a33cf","dataset_id":"ds005292","associated_paper_doi":null,"authors":["Zhao Xiangyue","Zhou Jingyao","Zhang Libo","Duan Haoqing","Wei Shiyu","Bi Yanzhi","Hu Li"],"bids_version":"1.1.1","contact_info":["Xiangyue Zhao"],"contributing_labs":null,"data_processed":true,"dataset_doi":"doi:10.18112/openneuro.ds005292.v1.0.0","datatypes":["eeg"],"demographics":{"subjects_count":142,"ages":[20,18,19,22,27,18,20,22,24,22,23,24,23,26,26,20,21,19,18,23,20,22,21,20,22,20,20,23,30,21,21,19,19,19,25,20,20,19,24,24,18,20,23,19,19,20,22,20,23,20,40,35,20,23,19,18,25,20,19,23,19,17,22,19,19,21,21,24,23,21,20,18,21,43,19,19,24,20,20,35,29,23,25,20,19,19,19,19,21,19,19,19,18,23,20,21,18,20,21,20,25,19,25,23,24,20,18,22,24,22,20,35,19,33,28,24,19,22,19,24,22,21,18,25,19,20,50,19,19,18,20,19,20,23,18,18,20,19,23,19,18,25],"age_min":17,"age_max":50,"age_mean":21.866197183098592,"species":null,"sex_distribution":{"f":87,"m":55},"handedness_distribution":null},"experimental_modalities":null,"external_links":{"source_url":"https://openneuro.org/datasets/ds005292","osf_url":null,"github_url":null,"paper_url":null},"funding":[],"ingestion_fingerprint":"b3957765f3c8ff8461ce7d9b441daccbf55a9bf33aad4c8a051e04b17df8e69f","license":"CC0","n_contributing_labs":null,"name":"142 by Biosemi","readme":"1.Study introduction:\nIn this experiment, the first 135 participants received fixed-intensity pain stimuli at 3J (low pain) and 3.5J (high pain), while participants 136-142 received fixed-intensity pain stimuli at 3.5J (low pain) and 4J (high pain). Each participant underwent stimulation in 3 blocks, with each block comprising 10 stimuli, totaling 30 stimuli. High and low pain stimuli were evenly distributed within each block. After each stimulation, participants provided pain ratings individually. Pain ratings were as follows: 0 indicated no sensation at all, 4 indicated the onset of pain, 6 represented moderate pain, 8 indicated severe pain, and 10 denoted unbearable pain.\n2.Participant task information(description of the experiment):\nParticipants received laser stimulation and subsequently provided pain intensity ratings one by one.\n3.Participant instructions(as exact as possible):\nParticipants were instructed to focus on the laser stimulation, keep their eyes open, and fix their gaze on the crosshairs displayed on the screen.  After each laser stimulation, there is a five-second pause.  Participants then rated the intensity of the pain.  Subsequent trials began at random 5 seconds after the score was provided.","recording_modality":["eeg"],"senior_author":"Hu Li","sessions":["1","2","3"],"size_bytes":54603307745,"source":"openneuro","study_design":null,"study_domain":null,"tasks":["142ByBiosemi"],"timestamps":{"digested_at":"2026-04-22T12:27:37.145764+00:00","dataset_created_at":"2024-06-26T14:05:20.306Z","dataset_modified_at":"2024-06-27T01:42:37.000Z"},"total_files":426,"storage":{"backend":"s3","base":"s3://openneuro.org/ds005292","raw_key":"dataset_description.json","dep_keys":["CHANGES","README","participants.json","participants.tsv","task-142ByBiosemi_events.json"]},"tagger_meta":{"config_hash":"4a051be509a0e3d0","metadata_hash":"16145073cf975b6e","model":"openai/gpt-5.2","tagged_at":"2026-01-20T17:46:26.953780+00:00"},"tags":{"pathology":["Healthy"],"modality":["Tactile"],"type":["Perception"],"confidence":{"pathology":0.65,"modality":0.8,"type":0.75},"reasoning":{"few_shot_analysis":"Closest few-shot by stimulus channel is the 'Braille letters - EEG' example (Pathology=Other, Modality=Tactile, Type=Learning). The convention it illustrates is that somatosensory stimulation delivered to the skin/fingers maps to Modality='Tactile' (even when responses are pedal/ratings). Our dataset also uses somatic stimulation (laser pain), so the same Modality convention applies. For Type, unlike the Braille example (learning/representations), this dataset focuses on perceived intensity ratings following nociceptive stimulation, which aligns more with perceptual processing than learning.","metadata_analysis":"Key metadata facts from the provided README:\n1) Somatosensory/nociceptive stimulation: \"participants received fixed-intensity pain stimuli\" and \"Participants received laser stimulation\".\n2) Perceptual report: \"After each stimulation, participants provided pain ratings individually\" and \"Participants then rated the intensity of the pain\".\n3) Visual fixation is instructional/background: \"keep their eyes open, and fix their gaze on the crosshairs displayed on the screen\" (not described as the primary stimulus manipulation).","paper_abstract_analysis":"No useful paper information.","evidence_alignment_check":"Pathology:\n- Metadata says: only \"participants\" are described; no diagnosis/clinical recruitment is mentioned (e.g., \"participants received... pain stimuli\").\n- Few-shot pattern suggests: when no disorder is stated, label as Healthy.\n- Alignment: ALIGN (no clinical population indicated).\n\nModality:\n- Metadata says: \"laser stimulation\" and \"fixed-intensity pain stimuli\".\n- Few-shot pattern suggests: skin/somatosensory stimulation (e.g., Braille under fingers) -> Tactile.\n- Alignment: ALIGN (laser pain is a tactile/somatosensory input channel; visual crosshair is secondary).\n\nType:\n- Metadata says: \"provided pain intensity ratings\" / \"rated the intensity of the pain\".\n- Few-shot pattern suggests: sensory discrimination/detection/perceptual reporting -> Perception (even with choice/ratings).\n- Alignment: Mostly ALIGN. A possible alternative is Affect because pain has affective components, but the explicit task goal is intensity perception/ratings rather than emotion induction/regulation.","decision_summary":"Top-2 candidates per category and final choice:\n\nPathology:\n- Healthy: Supported by absence of any diagnosis/recruitment criteria; metadata only refers to \"participants\" receiving stimuli.\n- Unknown: Possible if participant characteristics are entirely missing.\nFinal: Healthy (metadata provides no clinical group; by catalog convention, default to Healthy when no pathology is stated). Confidence=0.65 due to lack of explicit 'healthy controls' wording.\n\nModality:\n- Tactile: Supported by \"laser stimulation\" and \"pain stimuli\" delivered as somatosensory input.\n- Visual: Crosshair fixation is mentioned (\"fix their gaze on the crosshairs\"), but not as the main stimulus.\nFinal: Tactile. Confidence=0.8 (multiple explicit stimulation quotes; few-shot tactile convention match).\n\nType:\n- Perception: Supported by \"rated the intensity of the pain\" and fixed-intensity stimulus manipulation (low vs high pain), indicating sensory/perceptual evaluation.\n- Affect: Pain can engage affect, but metadata emphasizes intensity perception rather than emotional state.\nFinal: Perception. Confidence=0.75 (clear rating-of-sensation goal, but no explicit statement of cognitive construct beyond pain intensity)."}},"computed_title":"142 by Biosemi","nchans_counts":[{"val":64,"count":426}],"sfreq_counts":[{"val":1024.0,"count":420},{"val":2048.0,"count":6}],"stats_computed_at":"2026-04-22T23:16:00.309273+00:00","total_duration_s":231600.0,"author_year":"Xiangyue2024_142_Biosemi","canonical_name":null}}