{"dataset":{"id":"51212","dataset_id":"on002712","name":"Numbers and Letters","description":"This dataset contains neuroimaging data from an experiment investigating the neural processing of numbers, letters, and false fonts presented as single items or strings. The study employs event-related experimental design with two runs, each utilizing distinct stimulus categories marked by specific trigger codes to enable precise temporal analysis of brain responses to different visual stimuli. Data were acquired using magnetoencephalography (MEG).","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on002712","concept_doi":"10.82901/nemar.on002712","latest_version_doi":"10.82901/nemar.on002712.v1.0.0","created_at":"2026-06-21 06:31:02","updated_at":"2026-07-10 22:10:47","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"enriched\",\n  \"title\": \"Numbers and Letters\",\n  \"description\": \"This dataset contains neuroimaging data from an experiment investigating the neural processing of numbers, letters, and false fonts presented as single items or strings. The study employs event-related experimental design with two runs, each utilizing distinct stimulus categories marked by specific trigger codes to enable precise temporal analysis of brain responses to different visual stimuli. Data were acquired using magnetoencephalography (MEG).\",\n  \"license\": \"CC0\",\n  \"dataset_type\": \"raw\",\n  \"authors\": {\n    \"Sara Aurtenetxe\": {},\n    \"Nicola Molinaro\": {},\n    \"Doug Davidson\": {},\n    \"Manuel Carreiras\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"visual processing\"\n    },\n    {\n      \"term\": \"numbers\"\n    },\n    {\n      \"term\": \"letters\"\n    },\n    {\n      \"term\": \"false fonts\"\n    },\n    {\n      \"term\": \"event-related design\"\n    },\n    {\n      \"term\": \"stimulus presentation\"\n    },\n    {\n      \"term\": \"magnetoencephalography\"\n    },\n    {\n      \"term\": \"MEG\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on002712\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataexplorer/detail?dataset_id=on002712\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds001985\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsNewVersionOf\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds002712.v1.0.1\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    }\n  ],\n  \"resource_type_specific\": \"Structural MRI Dataset\",\n  \"modalities\": [\n    \"anat\",\n    \"beh\",\n    \"meg\"\n  ],\n  \"sizes\": [\n    \"332.8 GB (283 files)\"\n  ],\n  \"formats\": [\n    \".db\",\n    \".fif\",\n    \".gitattributes\",\n    \".gz\",\n    \".jpg\",\n    \".json\",\n    \".m\",\n    \".mat\",\n    \".md\",\n    \".tsv\",\n    \".yml\"\n  ],\n  \"source_hash\": \"f79fbe43608446a705982eadf78aa12f013e0efb59bccdd1f72ca55b6445b11a\"\n}","last_activity_at":"2026-06-21 06:31:02","source":"openneuro","source_id":"ds002712","subject_count":25,"modalities":"anat,beh,meg","age_min":null,"age_max":null,"file_size":332755537881,"total_files":563,"tasks":"numbersletters","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Sara Aurtenetxe, Nicola Molinaro, Doug Davidson, Manuel Carreiras","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on002712-blue)](https://doi.org/10.82901/nemar.on002712)\n\nOpenNeuro curator note: This dataset was previously accessible at ds001985. The dataset was reuploaded due to privacy considerations. \n\nThe experiment is composed by two runs\nWe here report the code triggers for each run:\n\nRun 1: single item\n10 = single numbers\n15 = single letters\n20 & 25 = single false fonts\n\nRun 2: strings\n35 = strings numbers\n40 = strings letters\n45 & 50 = strings false fonts\n\nraw files could be split into two files \n(e.g., run-1 + run-11)","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 14:04:37","zarr_store_count":50,"zarr_index_etag":"0f0f47ce1b790c3bd0c400ffe1394e9b","zarr_source_commit":"bdb82d32e2aced7f5436b13f81f00b47b8318cc3","archive_status":null,"archive_size":null,"archive_retry_count":0,"records_status":"ready","archive_skip_reason":"dataset 309.9 GB exceeds 100.0 GB archive limit; use direct download","zarr_errors":32,"zarr_failure_count":32,"zarr_deterministic":1,"zarr_failed_at":"2026-09-06 14:04:37","num_dataset_citations":0,"num_datapaper_citations":0,"n_channels":null,"electrode_system":null,"has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":332753388205,"data_complete":1,"withdrawn_at":null,"withdrawn_reason":null,"archive_complete":null,"archive_absent_files":null,"archive_declared_files":null,"zarr_pool_breaks":0,"total_recording_duration":35711,"recording_duration_min":121,"recording_duration_max":1598,"recording_count":82,"recordings_unavailable":32,"recordings_measured":50,"channel_count_min":312,"channel_count_max":361,"sampling_frequency":null,"power_line_frequency":null,"eeg_reference":null,"placement_scheme":null,"sweep_stamps":"{\"enrichment_updated_at\":\"2026-06-21 06:45:02\",\"metadata_updated_at\":\"2026-06-21 06:45:13\",\"archive_checked_at\":\"2026-06-21 06:45:47\",\"zarr_checked_at\":null,\"records_checked_at\":\"2026-06-21 06:46:33\",\"citations_updated_at\":\"2026-08-17 03:01:00\",\"channel_montage_checked_at\":null,\"hed_checked_at\":\"2026-06-30 04:38:30\",\"data_checked_at\":\"2026-07-28 03:00:49\",\"availability_report_at\":\"2026-07-23 01:12:13\",\"signal_defaults_at\":\"2026-09-02 11:55:57\",\"recording_stats_at\":\"2026-09-07 03:00:56\"}","participants":25,"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":"310 GB","zarr_data_failures":{"count":32,"detail_ref":"zarr/index.json","pending":0,"discovered":82},"zarr_index_url":"https://zarr.nemar.org/on002712/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}}