{"dataset":{"id":"61114","dataset_id":"on005586","name":"Electroencephalographic responses to the number of objects in partially occluded and uncovered scenes","description":"This dataset contains EEG recordings from 23 participants performing a passive viewing task involving partially occluded and uncovered visual scenes containing varying numbers of game pieces. The study investigates how the brain processes numerosity information under conditions of occlusion and disocclusion. Participants viewed scenes with 4 or 32 initially visible game pieces, followed by uncovering to reveal different numbers of additional pieces, across 640 trials.","owner_user_id":15,"status":"active","github_repo":"nemarDatasets/on005586","concept_doi":"10.82901/nemar.on005586","latest_version_doi":"10.82901/nemar.on005586.v1.0.0","created_at":"2026-06-27 13:00:59","updated_at":"2026-08-19 01:24:07","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"title\": \"Electroencephalographic responses to the number of objects in partially occluded and uncovered scenes\",\n  \"description\": \"This dataset contains EEG recordings from 23 participants performing a passive viewing task involving partially occluded and uncovered visual scenes containing varying numbers of game pieces. The study investigates how the brain processes numerosity information under conditions of occlusion and disocclusion. Participants viewed scenes with 4 or 32 initially visible game pieces, followed by uncovering to reveal different numbers of additional pieces, across 640 trials.\",\n  \"methods_description\": \"Participants performed a passive viewing task in a dimly lit room, viewing a game board with game pieces and a mesh occluder. Each trial began with a fixation cross, followed by a two-second presentation of the partially occluded scene (game pieces appearing only in the final second), then removal of the occluder to reveal the uncovered scene for one second. The experiment comprised eight blocks of 80 trials, with 16 conditions (2 initial visibility levels x 8 uncovering levels) each repeated 40 times, totaling 640 trials. Three participants were excluded due to excessive head movement or equipment malfunction.\",\n  \"license\": \"CC0\",\n  \"dataset_type\": \"raw\",\n  \"authors\": {\n    \"Cemre Baykan\": {},\n    \"Alexander C. Schütz\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"EEG\"\n    },\n    {\n      \"term\": \"numerosity\"\n    },\n    {\n      \"term\": \"visual perception\"\n    },\n    {\n      \"term\": \"occlusion\"\n    },\n    {\n      \"term\": \"scene perception\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/on005586\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"https://nemar.org/dataset/on005586\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": \"10.18112/openneuro.ds005586.v2.0.0\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    }\n  ],\n  \"funding_references\": [\n    {\n      \"funder_name\": \"European Research Council\",\n      \"award_number\": \"101001250\",\n      \"award_title\": \"ERC Horizon 2020 research and innovation programme\"\n    },\n    {\n      \"funder_name\": \"Hessian Ministry of Higher Education, Science, Research and Art\",\n      \"award_title\": \"The Adaptive Mind - Excellence Program\"\n    }\n  ],\n  \"resource_type_general\": \"Dataset\",\n  \"resource_type_specific\": \"EEG Dataset\",\n  \"modalities\": [\n    \"eeg\"\n  ],\n  \"sizes\": [\n    \"30.8 GB (73 files)\"\n  ],\n  \"formats\": [\n    \".Rmd\",\n    \".Rproj\",\n    \".csv\",\n    \".eeg\",\n    \".json\",\n    \".md\",\n    \".tsv\",\n    \".vhdr\",\n    \".vmrk\",\n    \".yml\"\n  ],\n  \"source_hash\": \"3141f1c45e65d50954a64024196c80fa07e7a59232708ca2fd9924dd7cf4c14e\"\n}","last_activity_at":"2026-06-27 13:00:59","source":"openneuro","source_id":"ds005586","subject_count":23,"modalities":"eeg","age_min":19,"age_max":44,"file_size":30791092376,"total_files":243,"tasks":"PassiveViewing","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Cemre Baykan, Alexander C. Schütz","license":"CC0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.on005586-blue)](https://doi.org/10.82901/nemar.on005586)\n\n**Passing Viewing Task**\r\n\r\n23 participants took part in this study in return for a monetary incentive at University of Marburg. \r\n\r\nParticipants performed a passive viewing task in a dimly lit room. The visual scene consisted of a game board, game pieces and a mesh as an occluder. \r\n\r\nEach trial started with a fixation cross presentation for one second plus the duration of the drift correction procedure. The game board and occluder were presented for two seconds, while game pieces only appeared in the last one second of this presentation. Following the “partially occluded scene”, the occluder disappeared to uncover the hidden parts of the game board along with the visible game pieces leading to the “uncovered scene” phase. The uncovered scene was presented for one second. \r\n\r\nThe experiment consisted of eight blocks of 80 trials each. There were two conditions of initially visible game pieces: 4 or 32 pieces, each with 8 uncovered conditions: 0, 1, 2, 4, 28, 30, 31 or 32 uncovered game pieces. All 16 conditions were repeated 40 times during the experiment, summing up to 640 trials in total.\r\n\r\nParticipants 9, 10 and 15 were excluded from the analyses due to excessive head movements and equipment malfunction.","bids_version":"1.7.0","sessions_count":null,"publish_date":null,"embedding_dirty":0,"license_tier":"public","zarr_status":"ready","zarr_converted_at":"2026-08-26 20:14:51","zarr_store_count":23,"zarr_index_etag":"388e6cf062ce0457b30a7c0278855351","zarr_source_commit":"54531614b1ad426d45626afb7209ee9bad26bbd0","archive_status":"ready","archive_size":20893237547,"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":60,"electrode_system":"10-10","has_hed":0,"hed_version":null,"is_exemplar":0,"bytes_present":30788476975,"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":120703.25999999998,"recording_duration_min":2484.86,"recording_duration_max":6886.7,"recording_count":23,"recordings_unavailable":0,"recordings_measured":23,"channel_count_min":63,"channel_count_max":63,"sampling_frequency":1000,"power_line_frequency":null,"eeg_reference":null,"placement_scheme":"based on the extended 10/20 system","sweep_stamps":"{\"enrichment_updated_at\":\"2026-08-19 01:23:55\",\"metadata_updated_at\":\"2026-08-19 01:24:06\",\"archive_checked_at\":\"2026-06-27 13:24:54\",\"zarr_checked_at\":null,\"records_checked_at\":\"2026-06-27 13:09:45\",\"citations_updated_at\":null,\"channel_montage_checked_at\":\"2026-06-28 23:49:09\",\"hed_checked_at\":\"2026-06-30 05:22:20\",\"data_checked_at\":\"2026-08-23 03:00:38\",\"availability_report_at\":\"2026-07-23 01:25:51\",\"recording_stats_at\":\"2026-09-02 11:33:26\",\"signal_defaults_at\":\"2026-09-02 12:38:52\"}","participants":23,"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":"28.68 GB","zarr_data_failures":null,"zarr_index_url":"https://zarr.nemar.org/on005586/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}}