{"dataset":{"id":"42484","dataset_id":"on004367","name":"Meta-rdk: Raw EEG data","description":"This dataset contains raw EEG recordings from a visual discrimination task comparing individuals with schizophrenia spectrum disorders and healthy controls. Participants performed a motion coherence discrimination task with adaptive difficulty while reporting confidence in their perceptual decisions. The study investigates neural correlates of perceptual decision-making and metacognitive processes in schizophrenia.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on004367","concept_doi":"10.82901/nemar.on004367","latest_version_doi":"10.82901/nemar.on004367.v1.0.0","created_at":"2026-06-18 05:01:08","updated_at":"2026-07-10 22:29:50","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"title\": \"Meta-rdk: Raw EEG data\",\n  \"description\": \"This dataset contains raw EEG recordings from a visual discrimination task comparing individuals with schizophrenia spectrum disorders and healthy controls. Participants performed a motion coherence discrimination task with adaptive difficulty while reporting confidence in their perceptual decisions. The study investigates neural correlates of perceptual decision-making and metacognitive processes in schizophrenia.\",\n  \"methods_description\": \"EEG data were collected during a visual discrimination task using 100 moving dots at varying coherence levels adapted via 1up/2down staircase procedure. Participants indicated motion direction (left/right) via mouse click and subsequently reported confidence on a visual analog scale (0-100%). Task difficulty was individually calibrated to match performance between patient and control groups.\",\n  \"license\": \"CC0\",\n  \"dataset_type\": \"raw\",\n  \"authors\": {\n    \"Martin Rouy\": {},\n    \"Matthieu Roger\": {},\n    \"Dorian Goueytes\": {},\n    \"Michael Pereira\": {},\n    \"Paul Roux\": {},\n    \"Nathan Faivre\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"EEG\"\n    },\n    {\n      \"term\": \"schizophrenia\"\n    },\n    {\n      \"term\": \"perceptual decision-making\"\n    },\n    {\n      \"term\": \"metacognition\"\n    },\n    {\n      \"term\": \"visual discrimination\"\n    },\n    {\n      \"term\": \"motion coherence\"\n    },\n    {\n      \"term\": \"confidence judgment\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on004367\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataexplorer/detail?dataset_id=on004367\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds004367.v1.0.2\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    }\n  ],\n  \"resource_type_specific\": \"EEG Dataset\",\n  \"modalities\": [\n    \"eeg\"\n  ],\n  \"sizes\": [\n    \"30.0 GB (81 files)\"\n  ],\n  \"formats\": [\n    \".fdt\",\n    \".json\",\n    \".md\",\n    \".set\",\n    \".tsv\",\n    \".yml\"\n  ],\n  \"source_hash\": \"832e01105803f666a596f8129fd70e5f4470228c11526bd22e36fd836c2baa2b\"\n}","last_activity_at":"2026-06-18 05:01:08","source":"openneuro","source_id":"ds004367","subject_count":40,"modalities":"eeg","age_min":19,"age_max":62,"file_size":30036600428,"total_files":81,"tasks":"rdk","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Martin Rouy, Matthieu Roger, Dorian Goueytes, Michael Pereira, Paul Roux, Nathan Faivre","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on004367-blue)](https://doi.org/10.82901/nemar.on004367)\n\nThe study was approved by the ethical committee Sud M�dit�rann�e II (217 R01). Twenty individuals with a schizophrenia spectrum disorder (schizophrenia or schizoaffective disorder, 16 males, 4 females) and 22 healthy participants (15 males, 7 females) from the general population took part in this study. Schizophrenia and schizoaffective disorders were diagnosed based on the Structured Clinical Interview for assessing the DSM-5 criteria. The control group was screened for current or past psychiatric illness, and individuals were excluded if they met the criteria for a severe and persistent mental disorder.                                                                                                                                                                                                                                                                \n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    \nWe used a visual discrimination task. Stimuli consisted of 100 moving dots within a circle (3� radius) at the center of the screen. On each trial, participants indicated whether the motion direction of the dots was to the left or to the right by reaching and clicking on one of two choice targets (3� radius circle) at the top corners of the screen with a mouse. After 6 seconds without response, a buzz sound rang and a message was displayed inviting the participant to respond quicker. Motion coherence was adapted at the individual level via a 1up/2down staircase procedure in order to match task-performance between groups. Following each perceptual decision, participants were asked to report their confidence about their response using a vertical visual analog scale from 0% (Sure incorrect) to 100% (Sure correct), with 50% confidence meaning �Not sure at all�.\u0000","bids_version":"1.1.1","sessions_count":null,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-09-06 07:59:17","zarr_store_count":40,"zarr_index_etag":"724707ac4fed5d9ceaff816d4357feb0","zarr_source_commit":"fd6f8a7779ec919b7cac07ffa8ae45eec542701c","archive_status":"ready","archive_size":26287419167,"archive_retry_count":0,"records_status":"ready","archive_skip_reason":null,"zarr_errors":0,"zarr_failure_count":0,"zarr_deterministic":0,"zarr_failed_at":null,"num_dataset_citations":0,"num_datapaper_citations":0,"n_channels":68,"electrode_system":"10-10","has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":null,"data_complete":null,"withdrawn_at":null,"withdrawn_reason":null,"archive_complete":null,"archive_absent_files":null,"archive_declared_files":null,"zarr_pool_breaks":0,"total_recording_duration":89314.55999999997,"recording_duration_min":1619.092,"recording_duration_max":3526.48,"recording_count":40,"recordings_unavailable":0,"recordings_measured":40,"channel_count_min":68,"channel_count_max":68,"sampling_frequency":1200,"power_line_frequency":50,"eeg_reference":"AFz","placement_scheme":"10-20","sweep_stamps":"{\"enrichment_updated_at\":\"2026-06-18 05:08:52\",\"metadata_updated_at\":\"2026-06-18 05:08:52\",\"archive_checked_at\":\"2026-06-18 05:27:29\",\"zarr_checked_at\":null,\"records_checked_at\":\"2026-06-18 05:10:08\",\"citations_updated_at\":null,\"channel_montage_checked_at\":\"2026-06-28 23:23:33\",\"hed_checked_at\":\"2026-06-30 04:57:30\",\"data_checked_at\":null,\"availability_report_at\":\"2026-07-23 01:18:21\",\"signal_defaults_at\":\"2026-09-02 12:11:06\",\"recording_stats_at\":\"2026-09-07 03:01:07\"}","participants":40,"num_citations":0,"latest_version":"v1.0.0","zarr_verify_status":null,"zarr_verified_at":null,"owner_username":"nemarAdmin","owner_github":"nemarAdmin","file_size_formatted":"27.97 GB","zarr_data_failures":null,"zarr_index_url":"https://zarr.nemar.org/on004367/zarr/index.json","attestation_deposit_type":null,"attestation_key_status":null,"attestation_deidentified":null,"attestation_no_duplicate":null,"attestation_upstream_source":null,"attestation_accepted_at":null}}