{"dataset":{"id":"59502","dataset_id":"on004865","name":"pyFR: Delayed Free Recall of Word Lists, Preliminary Cognitive Electrophysiology Study","description":"This dataset comprises behavioral event logs and intracranial electrophysiological (iEEG) recordings from a delayed free recall task, collected across multiple clinical sites in collaboration with the Computational Memory Lab at the University of Pennsylvania. Participants studied lists of visually presented words, performed arithmetic distractor tasks, and then freely recalled the words in any order. This preliminary cognitive electrophysiology study served as a predecessor to the later FR1 and CatFR1 datasets.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on004865","concept_doi":"10.82901/nemar.on004865","latest_version_doi":"10.82901/nemar.on004865.v1.0.0","created_at":"2026-06-25 21:01:56","updated_at":"2026-08-19 02:24:15","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"enriched\",\n  \"title\": \"pyFR: Delayed Free Recall of Word Lists, Preliminary Cognitive Electrophysiology Study\",\n  \"description\": \"This dataset comprises behavioral event logs and intracranial electrophysiological (iEEG) recordings from a delayed free recall task, collected across multiple clinical sites in collaboration with the Computational Memory Lab at the University of Pennsylvania. Participants studied lists of visually presented words, performed arithmetic distractor tasks, and then freely recalled the words in any order. This preliminary cognitive electrophysiology study served as a predecessor to the later FR1 and CatFR1 datasets.\",\n  \"methods_description\": \"Intracranial EEG recordings were collected using monopolar and bipolar referencing schemes across multiple recording systems, with voltage values scaled to a common unit (V). Electrode montages were unique to each subject, with MNI and Talairach coordinates and brain region annotations provided 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\": \"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\": \"intracranial electrodes\"\n    },\n    {\n      \"term\": \"electrophysiology\"\n    },\n    {\n      \"term\": \"cognitive neuroscience\"\n    },\n    {\n      \"term\": \"delayed free recall word-list paradigm\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on004865\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds004789\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsSupplementedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds004809\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsSupplementedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds004865.v2.0.1\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataset/on004865\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    }\n  ],\n  \"funding_references\": [\n    {\n      \"funder_name\": \"NIH\",\n      \"award_number\": \"MH055687\"\n    },\n    {\n      \"funder_name\": \"NIH\",\n      \"award_number\": \"MH061975\"\n    }\n  ],\n  \"resource_type_general\": \"Dataset\",\n  \"resource_type_specific\": \"Neuroimaging Dataset\",\n  \"modalities\": [\n    \"beh\",\n    \"ieeg\"\n  ],\n  \"sizes\": [\n    \"105.0 GB (174 files)\"\n  ],\n  \"formats\": [\n    \".edf\",\n    \".json\",\n    \".md\",\n    \".tsv\",\n    \".txt\",\n    \".yml\"\n  ],\n  \"source_hash\": \"cd3e1fcf7c13fdae3dfe56ff5b1a48cabf170a8eb53712ecbdaf33929feeea52\"\n}","last_activity_at":"2026-06-25 21:01:56","source":"openneuro","source_id":"ds004865","subject_count":49,"modalities":"beh,ieeg","age_min":15,"age_max":57,"file_size":104999475896,"total_files":1248,"tasks":"pyFR","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.on004865-blue)](https://doi.org/10.82901/nemar.on004865)\n\n### pyFR: Delayed Free Recall of Word Lists, Preliminary Cognitive Electrophysiology Study\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 recalled 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\nThis study was a preliminary cogntive electrophysiology study undertaken by the Computational Memory Lab, and is a predecessor to the following datasets: [FR1](https://openneuro.org/datasets/ds004789) & [CatFR1](https://openneuro.org/datasets/ds004809)\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.","bids_version":"1.7.0","sessions_count":9,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-08-07 15:37:00","zarr_store_count":172,"zarr_index_etag":"2e2ec156ba221638234db29a928c0be9","zarr_source_commit":"e9454234cee8467d4a1875dc9f17b1f6ad640457","archive_status":"ready","archive_size":84635135785,"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":null,"electrode_system":null,"has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":104990251722,"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":650261.1079999998,"recording_duration_min":877.242,"recording_duration_max":8875,"recording_count":172,"recordings_unavailable":0,"recordings_measured":172,"channel_count_min":27,"channel_count_max":203,"sampling_frequency":null,"power_line_frequency":null,"eeg_reference":null,"placement_scheme":null,"sweep_stamps":"{\"enrichment_updated_at\":\"2026-08-19 02:24:01\",\"metadata_updated_at\":\"2026-08-19 02:24:14\",\"archive_checked_at\":\"2026-06-25 22:10:19\",\"zarr_checked_at\":null,\"records_checked_at\":\"2026-06-25 21:14:29\",\"citations_updated_at\":null,\"channel_montage_checked_at\":\"2026-06-28 23:35:16\",\"hed_checked_at\":\"2026-06-30 05:08:22\",\"data_checked_at\":\"2026-08-16 03:00:59\",\"availability_report_at\":\"2026-07-23 01:21:45\",\"recording_stats_at\":\"2026-09-02 11:33:02\",\"signal_defaults_at\":\"2026-09-02 12:22:18\"}","participants":49,"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":"97.79 GB","zarr_data_failures":null,"zarr_index_url":"https://zarr.nemar.org/on004865/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}}