{"success":true,"database":"eegdash","data":{"_id":"6953f4249276ef1ee07a338d","dataset_id":"ds004837","associated_paper_doi":null,"authors":["Fran López-Caballero","Mark Curtis","Brian Coffman","Dean Salisbury"],"bids_version":"1.1.1","contact_info":["Fran López-Caballero"],"contributing_labs":null,"data_processed":true,"dataset_doi":"doi:10.18112/openneuro.ds004837.v1.0.2","datatypes":["meg"],"demographics":{"subjects_count":60,"ages":[],"age_min":null,"age_max":null,"age_mean":null,"species":null,"sex_distribution":null,"handedness_distribution":null},"experimental_modalities":null,"external_links":{"source_url":"https://openneuro.org/datasets/ds004837","osf_url":null,"github_url":null,"paper_url":null},"funding":["R01 MH108568 and MH113533 NIH/United States"],"ingestion_fingerprint":"dd1da7a0023ceffdd7fbb09a19cd163215e5d64eb4c42ed325f3a3bd88e2eb93","license":"CC0","n_contributing_labs":null,"name":"Magnetoencephalographic (MEG) Pitch and Duration Mismatch Negativity (MMN) in First-Episode Psychosis","readme":"Project Title: Pittsburgh Early Psychosis Program (PEPP): Mismatch Negativity (MMN) in First-Episode Psychosis\nExpected experimentation period:\nStart date: 12/01/2017\nEnd date: 09/15/2021\nProject Description:\nOddball paradigm with standards, pitch deviants and duration deviants. Extended description at: https://doi.org/10.1111/ejn.16107\nParticipant categories:\nHealthy controls (HC), First-episode Schizophrenia (FESZ), First-episode Affective Psychosis (FEAFF)\nFurther information about clinical, neuropsychological, demographic and medication data can be found in derivatives/participants.csv\nEvents:\n1: standard\n2: pitch deviant\n3: duration deviant\nFunding:\nNational Institutes of Health (R01 MH108568 and MH113533)","recording_modality":["meg"],"senior_author":"Dean Salisbury","sessions":["0001"],"size_bytes":128779377455,"source":"openneuro","study_design":null,"study_domain":null,"tasks":["attnmod"],"timestamps":{"digested_at":"2026-04-22T12:27:01.886859+00:00","dataset_created_at":"2023-11-01T15:54:14.672Z","dataset_modified_at":"2025-05-27T15:41:36.000Z"},"total_files":106,"storage":{"backend":"s3","base":"s3://openneuro.org/ds004837","raw_key":"dataset_description.json","dep_keys":["CHANGES","README"]},"tagger_meta":{"config_hash":"4a051be509a0e3d0","metadata_hash":"23c9617d52e43a88","model":"openai/gpt-5.2","tagged_at":"2026-01-20T17:33:23.430161+00:00"},"tags":{"pathology":["Schizophrenia/Psychosis"],"modality":["Auditory"],"type":["Perception"],"confidence":{"pathology":0.85,"modality":0.9,"type":0.7},"reasoning":{"few_shot_analysis":"Most similar few-shot examples by paradigm and population are: (1) the Parkinson's cross-modal oddball dataset (Multisensory, Clinical/Intervention) which shows that an oddball paradigm maps modality to the sensory channels of the deviants/cues; and (2) the TBI three-stim auditory oddball dataset (Auditory) which shows that an auditory oddball paradigm is labeled with Auditory modality. For pathology, the schizophrenia-spectrum example (schizophrenia patients + controls) shows that when participants are recruited as psychosis/schizophrenia patients, Pathology should be labeled Schizophrenia/Psychosis.","metadata_analysis":"Key metadata facts: (1) Clinical recruitment: \"Participant categories:\\nHealthy controls (HC), First-episode Schizophrenia (FESZ), First-episode Affective Psychosis (FEAFF)\" and title line \"Mismatch Negativity (MMN) in First-Episode Psychosis\". (2) Paradigm and stimulus structure: \"Oddball paradigm with standards, pitch deviants and duration deviants.\" and \"Events:\\n1: standard\\n2: pitch deviant\\n3: duration deviant\". These indicate an MMN auditory deviance paradigm with psychosis-spectrum first-episode participants plus controls.","paper_abstract_analysis":"No useful paper information. (A DOI link is provided, but no abstract text is included in the provided metadata.)","evidence_alignment_check":"Pathology — Metadata says: \"First-Episode Psychosis\" and \"First-episode Schizophrenia (FESZ), First-episode Affective Psychosis (FEAFF)\". Few-shot pattern suggests: schizophrenia/psychosis patient recruitment maps to Schizophrenia/Psychosis. ALIGN.\nModality — Metadata says: \"Mismatch Negativity (MMN)\" with \"pitch deviants\" and \"duration deviants\" in an \"Oddball paradigm\" (auditory features). Few-shot pattern suggests: oddball with tone deviants maps to Auditory (see TBI auditory oddball example). ALIGN.\nType — Metadata says: MMN in an oddball with standards vs deviants (no explicit decision/reward/learning described): \"standards, pitch deviants and duration deviants\" and event codes for deviance detection. Few-shot pattern is mixed: one oddball example is labeled Clinical/Intervention due to strong clinical-cognition biomarker framing in PD, whereas the mechanics here are primarily sensory deviance processing (MMN). PARTIAL ALIGN; selecting Perception because the task is fundamentally sensory deviance detection rather than decision-making or learning, and there is no intervention described.","decision_summary":"Pathology top-2: (a) Schizophrenia/Psychosis (winner) — supported by \"First-episode Schizophrenia (FESZ)\", \"First-episode Affective Psychosis (FEAFF)\", and \"First-Episode Psychosis\"; (b) Healthy — present as controls (\"Healthy controls (HC)\") but not the recruited clinical focus. Final: Schizophrenia/Psychosis. Alignment: aligned with few-shot schizophrenia-spectrum convention.\nModality top-2: (a) Auditory (winner) — supported by \"Mismatch Negativity (MMN)\", \"Oddball paradigm... pitch deviants and duration deviants\", and \"Events: ... pitch deviant ... duration deviant\"; (b) Multisensory — no evidence of multiple sensory channels. Final: Auditory. Alignment: aligned with few-shot oddball modality convention.\nType top-2: (a) Perception (winner) — MMN/oddball deviance detection (standards vs pitch/duration deviants) is a sensory processing construct; (b) Clinical/Intervention — plausible because the dataset is in first-episode psychosis and could be biomarker-oriented, but no intervention/clinical trial procedure is described in the provided metadata. Final: Perception. Alignment: partially aligned; chosen based on task construct emphasis in metadata (sensory deviance/MMN).","confidence_notes":"Confidence is based on explicit metadata statements: pathology and modality are directly stated; type is inferred from MMN/oddball construct without an explicit cognitive label in metadata."}},"nemar_citation_count":0,"computed_title":"Magnetoencephalographic (MEG) Pitch and Duration Mismatch Negativity (MMN) in First-Episode Psychosis","nchans_counts":[],"sfreq_counts":[{"val":3000.0,"count":98},{"val":1000.0,"count":8}],"stats_computed_at":"2026-04-21T23:17:03.730639+00:00","total_duration_s":null,"author_year":"LopezCaballero2023","size_human":"119.9 GB","canonical_name":null}}