{"dataset":{"id":"57710","dataset_id":"on004554","name":"Forced Picture Naming Task","description":"This dataset comprises preprocessed EEG recordings from 16 native French-speaking participants performing a forced picture naming task. Participants viewed images from the Snodgrass & Vanderwart corpus and were required to name them while EEG activity was recorded across baseline, visual stimulation, and naming phases. The dataset contains 270 trials per subject and was used to characterize spatiotemporal dynamics in EEG data using optical flow pattern analysis. Note: 16 participants represent the final cohort after 4 exclusions from an initial 20 subjects due to hardware failure.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on004554","concept_doi":"10.82901/nemar.on004554","latest_version_doi":"10.82901/nemar.on004554.v1.0.0","created_at":"2026-06-24 18:31:46","updated_at":"2026-07-10 22:34:12","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"title\": \"Forced Picture Naming Task\",\n  \"description\": \"This dataset comprises preprocessed EEG recordings from 16 native French-speaking participants performing a forced picture naming task. Participants viewed images from the Snodgrass & Vanderwart corpus and were required to name them while EEG activity was recorded across baseline, visual stimulation, and naming phases. The dataset contains 270 trials per subject and was used to characterize spatiotemporal dynamics in EEG data using optical flow pattern analysis. Note: 16 participants represent the final cohort after 4 exclusions from an initial 20 subjects due to hardware failure.\",\n  \"methods_description\": \"EEG data were collected during a picture naming task with three phases per trial: baseline (−2 to 0 s), visual stimulation (0 to 1.5 s), and naming (1.5 to 3 s). Stimuli were black-and-white line drawings from the Snodgrass & Vanderwart corpus presented on screen. Participants were native French speakers aged 18–70 years with normal or corrected-to-normal vision and hearing, and right-handedness. Data were preprocessed according to a standardized pipeline. A total of 270 trials were collected per subject across 16 participants (final cohort after exclusion of 4 subjects due to hardware failure from an initial 20 subjects).\",\n  \"license\": \"CC0\",\n  \"dataset_type\": \"raw\",\n  \"authors\": {\n    \"V. Volpert\": {},\n    \"B. Xu\": {},\n    \"A. Tchechmedjiev\": {},\n    \"S. Harispe\": {},\n    \"A. Aksenov\": {},\n    \"Q. Mesnildrey and A. Beuter\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"EEG\"\n    },\n    {\n      \"term\": \"picture naming\"\n    },\n    {\n      \"term\": \"event-related potentials\"\n    },\n    {\n      \"term\": \"visual processing\"\n    },\n    {\n      \"term\": \"language production\"\n    },\n    {\n      \"term\": \"optical flow\"\n    },\n    {\n      \"term\": \"Snodgrass & Vanderwart corpus\"\n    },\n    {\n      \"term\": \"French speakers\"\n    },\n    {\n      \"term\": \"preprocessing\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"10.3934/mbe.2023507\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"References\"\n    },\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on004554\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataexplorer/detail?dataset_id=on004554\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds004554.v1.0.4\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    }\n  ],\n  \"resource_type_specific\": \"EEG Dataset\",\n  \"modalities\": [\n    \"eeg\"\n  ],\n  \"sizes\": [\n    \"9.4 GB (19 files)\"\n  ],\n  \"formats\": [\n    \".json\",\n    \".md\",\n    \".pdf\",\n    \".set\",\n    \".tsv\",\n    \".yml\"\n  ],\n  \"source_hash\": \"b9ec0fb8e913c80a172322168184f7407a65f355d30d97aec237644cf20aee6c\"\n}","last_activity_at":"2026-06-24 18:31:46","source":"openneuro","source_id":"ds004554","subject_count":16,"modalities":"eeg","age_min":null,"age_max":null,"file_size":9432868624,"total_files":107,"tasks":"picturenaming","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"V. Volpert, B. Xu, A. Tchechmedjiev, S. Harispe, A. Aksenov, Q. Mesnildrey and A. Beuter","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on004554-blue)](https://doi.org/10.82901/nemar.on004554)\n\nThis is the preprocessed dataset used for study \"Characterization of spatiotemporal dynamics in EEG data during picture naming with optical flow patterns\". \n\nThe Picture Naming Task study included sixteen native French-speaking men, ranging in age from 18 to 70 years old. The participants met the inclusion criteria, which required normal or corrected-to-normal vision and hearing, as well as right-handedness, as determined by a handedness questionnaire [Oldfield1971assessment]. Exclusion criteria were in place to ensure that participants had no history of neurological or psychiatric disorders, drug addiction, or head trauma. In total 20 subjects were included in the study. The four first subjects' data was excluded due to hardware failure. \n\nParticipants were required to name the pictures shown on a screen. Each event (random pictures) has three phases: [-2s, 0s] is the baseline (pre-visual-stimulation); at time 0 picture is shown on screen; then [0s, 1.5s] post-stimulation phase; [1.5s, 3s], naming phase. Pictures used in the task were selected from the Snodgrass & Vanderwart black-and-white line drawing corpus [Snodgrass1980standardized]. \"./code/experiment_schema.pdf\" showed the task design.\n\nData pre-processing pipeline is illustrated in \"./code/preprocess_pipeline.pdf\". In total, 270 trials each for the 16 subjects.\n","bids_version":"1.8.0","sessions_count":null,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"failed","zarr_converted_at":null,"zarr_store_count":null,"zarr_index_etag":null,"zarr_source_commit":null,"archive_status":"ready","archive_size":8709896026,"archive_retry_count":0,"records_status":null,"archive_skip_reason":null,"zarr_errors":16,"zarr_failure_count":16,"zarr_deterministic":1,"zarr_failed_at":"2026-08-06 04:53:11","num_dataset_citations":0,"num_datapaper_citations":3,"n_channels":99,"electrode_system":"10-05","has_hed":0,"hed_version":"8.1.0","is_exemplar":0,"bytes_present":9432624695,"data_complete":1,"withdrawn_at":null,"withdrawn_reason":null,"archive_complete":null,"archive_absent_files":null,"archive_declared_files":null,"zarr_pool_breaks":null,"total_recording_duration":null,"recording_duration_min":null,"recording_duration_max":null,"recording_count":null,"recordings_unavailable":null,"recordings_measured":null,"channel_count_min":null,"channel_count_max":null,"sampling_frequency":1000,"power_line_frequency":50,"eeg_reference":"Afz","placement_scheme":null,"sweep_stamps":"{\"enrichment_updated_at\":\"2026-06-24 18:39:10\",\"metadata_updated_at\":\"2026-06-24 18:39:11\",\"archive_checked_at\":\"2026-06-24 18:46:36\",\"zarr_checked_at\":null,\"records_checked_at\":null,\"citations_updated_at\":\"2026-09-08 03:00:51\",\"channel_montage_checked_at\":\"2026-06-28 23:29:33\",\"hed_checked_at\":\"2026-06-30 05:01:40\",\"data_checked_at\":\"2026-08-12 03:00:27\",\"availability_report_at\":\"2026-07-23 01:19:36\",\"recording_stats_at\":null,\"signal_defaults_at\":\"2026-09-02 12:16:05\"}","participants":16,"num_citations":3,"latest_version":"v1.0.0","zarr_verify_status":null,"zarr_verified_at":null,"owner_username":"nemarAdmin","owner_github":"nemarAdmin","file_size_formatted":"8.79 GB","zarr_data_failures":{"count":16,"detail_ref":"zarr/index.json","compacted_by":"migration_0074"},"zarr_index_url":null,"attestation_deposit_type":null,"attestation_key_status":null,"attestation_deidentified":null,"attestation_no_duplicate":null,"attestation_upstream_source":null,"attestation_accepted_at":null}}