{"dataset":{"id":"59023","dataset_id":"on004789","name":"Delayed Free Recall of Word Lists","description":"This dataset contains intracranial EEG recordings and behavioral event data from patients performing a delayed free recall task, in which participants studied word lists, engaged in an arithmetic distractor task, and freely recalled words. Data were collected across multiple clinical sites in collaboration with the Computational Memory Lab at the University of Pennsylvania, providing electrode localization and referencing information suitable for memory and epilepsy research.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on004789","concept_doi":"10.82901/nemar.on004789","latest_version_doi":"10.82901/nemar.on004789.v1.0.0","created_at":"2026-06-25 13:01:53","updated_at":"2026-08-19 04:13:24","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"title\": \"Delayed Free Recall of Word Lists\",\n  \"description\": \"This dataset contains intracranial EEG recordings and behavioral event data from patients performing a delayed free recall task, in which participants studied word lists, engaged in an arithmetic distractor task, and freely recalled words. Data were collected across multiple clinical sites in collaboration with the Computational Memory Lab at the University of Pennsylvania, providing electrode localization and referencing information suitable for memory and epilepsy research.\",\n  \"methods_description\": \"Participants studied lists of words presented visually one at a time, then completed arithmetic distractor problems, followed by free recall of the words in any order. Intracranial EEG was recorded using monopolar and bipolar referencing schemes across multiple recording systems, with voltage values standardized to microvolts. Electrode locations were annotated with MNI and Talairach coordinates and brain region labels when available.\",\n  \"license\": \"CC0\",\n  \"dataset_type\": \"raw\",\n  \"authors\": {\n    \"Haydn G. Herrema\": {},\n    \"Michael J. Kahana\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"iEEG\"\n    },\n    {\n      \"term\": \"intracranial electrodes\"\n    },\n    {\n      \"term\": \"free recall\"\n    },\n    {\n      \"term\": \"Memory\",\n      \"subject_scheme\": \"MeSH\",\n      \"value_uri\": \"http://id.nlm.nih.gov/mesh/D008568\"\n    },\n    {\n      \"term\": \"Epilepsy\",\n      \"subject_scheme\": \"MeSH\",\n      \"value_uri\": \"http://id.nlm.nih.gov/mesh/D004827\"\n    },\n    {\n      \"term\": \"electrode localization\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on004789\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds004789\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsVersionOf\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds004789.v3.1.0\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataset/on004789\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    }\n  ],\n  \"funding_references\": [\n    {\n      \"funder_name\": \"DARPA\",\n      \"award_number\": \"N66001-14-2-4032\",\n      \"award_title\": \"RAM\"\n    },\n    {\n      \"funder_name\": \"NIH\",\n      \"award_number\": \"R01-NS-106611\"\n    },\n    {\n      \"funder_name\": \"NIH\",\n      \"award_number\": \"U01-NS-113198\"\n    }\n  ],\n  \"resource_type_general\": \"Dataset\",\n  \"resource_type_specific\": \"Neuroimaging Dataset\",\n  \"modalities\": [\n    \"beh\",\n    \"ieeg\"\n  ],\n  \"sizes\": [\n    \"618.7 GB (989 files)\"\n  ],\n  \"formats\": [\n    \".edf\",\n    \".json\",\n    \".md\",\n    \".tsv\",\n    \".txt\",\n    \".yml\"\n  ],\n  \"source_hash\": \"242bbf8e4cc29c7e1c2761fef0148729230dc2fc64013633e60178d60c31b0fe\"\n}","last_activity_at":"2026-06-25 13:01:53","source":"openneuro","source_id":"ds004789","subject_count":280,"modalities":"beh,ieeg","age_min":18,"age_max":65,"file_size":618808966620,"total_files":7429,"tasks":"FR1","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Haydn G. Herrema, Michael J. Kahana","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on004789-blue)](https://doi.org/10.82901/nemar.on004789)\n\n### Delayed Free Recall of Word Lists\n\n#### Description\nThis dataset contains behavioral events and intracranial electrophysiological recordings from a delayed free recall task.  The experiment consists of participants studying a list of words, presented visually one at a time, completing simple arithmetic problems that function as a distractor, and then freely recalling the words from the just-presented list in any order.  The data was collected at clinical sites across the country as part of a collaboration with the Computational Memory Lab at the University of Pennsylvania.\n\n#### To Note\n* The iEEG recordings are labeled either \"monopolar\" or \"bipolar.\"  The monopolar recordings are referenced (typically a mastoid reference), but should always be re-referenced before analysis.  The bipolar recordings are referenced according to a paired scheme indicated by the accompanying bipolar channels tables.\n* Each subject has a unique montage of electrode locations.  MNI and Talairach coordinates are provided when available, along with brain region annotations.\n* Recordings were made on multiple different systems, so we have done the scaling to provide all voltage values in V.\n\n#### Contact\nFor questions or inquiries, please contact sas-kahana-sysadmin@sas.upenn.edu.\n","bids_version":"1.7.0","sessions_count":12,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-08-11 21:37:59","zarr_store_count":983,"zarr_index_etag":"1b23493130c2e926a01615435e65258a","zarr_source_commit":"bfac46798cdc1769ef43a9abb98f12b6cd381de8","archive_status":null,"archive_size":null,"archive_retry_count":0,"records_status":"ready","archive_skip_reason":"dataset 576.3 GB exceeds 100.0 GB archive limit; use direct download","zarr_errors":0,"zarr_failure_count":0,"zarr_deterministic":0,"zarr_failed_at":null,"num_dataset_citations":2,"num_datapaper_citations":0,"n_channels":null,"electrode_system":null,"has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":618713686062,"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":2795791.9960000003,"recording_duration_min":706,"recording_duration_max":13098,"recording_count":983,"recordings_unavailable":0,"recordings_measured":983,"channel_count_min":14,"channel_count_max":224,"sampling_frequency":null,"power_line_frequency":null,"eeg_reference":null,"placement_scheme":null,"sweep_stamps":"{\"enrichment_updated_at\":\"2026-08-19 04:13:07\",\"metadata_updated_at\":\"2026-08-19 04:13:23\",\"archive_checked_at\":\"2026-06-25 13:20:47\",\"zarr_checked_at\":null,\"records_checked_at\":\"2026-06-25 13:21:56\",\"citations_updated_at\":\"2026-09-09 03:00:15\",\"channel_montage_checked_at\":\"2026-06-28 23:33:13\",\"hed_checked_at\":\"2026-06-30 05:06:10\",\"data_checked_at\":\"2026-08-14 03:00:55\",\"availability_report_at\":\"2026-07-23 01:20:54\",\"recording_stats_at\":\"2026-09-02 11:32:57\",\"signal_defaults_at\":\"2026-09-02 12:20:27\"}","participants":280,"num_citations":2,"latest_version":"v1.0.0","zarr_verify_status":null,"zarr_verified_at":null,"owner_username":"nemarAdmin","owner_github":"nemarAdmin","file_size_formatted":"576 GB","zarr_data_failures":null,"zarr_index_url":"https://zarr.nemar.org/on004789/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}}