{"format":"nemar-zarr-index","format_version":3,"dataset_id":"nm000144","contract_base":"https://zarr.nemar.org/nm000144/zarr/","data_base":"https://nemar.s3.us-east-2.amazonaws.com/nm000144/zarr/","data_base_kind":"s3-public","s3_uri":"s3://nemar/nm000144/zarr/","s3_region":"us-east-2","s3_anonymous":true,"source_commit":"a3441effc72a78d2ad2bf42b4af3ebb2dbc8fafe","engine_version":"3","biosigio_version":"1.2.7","updated_utc":"2026-09-04T12:48:18Z","doi":"10.82901/nemar.nm000144","license":"CC-BY-NC-ND-4.0","citation":"Reinhold Scherer, Josef Faller, Elisabeth V. C. Friedrich, Eloy Opisso, Ursula Costa, Andrea K\u00fcbler, Gernot R. M\u00fcller-Putz (2026) BNCI 2015-004 Mental tasks dataset (v1.0.2). NEMAR. https://doi.org/10.82901/nemar.nm000144","hed_version":"8.4.0","layout":{"level0":"<zarr>/<group>/0","view":"<zarr>/<group>/view/<L>","view_levels":"1..n_view_levels from the group attrs","scale_offset":"level-0 array attrs scale[] and offset[]; physical = digital * scale + offset","events":"<data_base>events.parquet"},"discovered_count":18,"store_count":18,"n_recordings":18,"errors":0,"failure_count":0,"pending_count":0,"stores":[{"path":"sub-1/ses-0/eeg/sub-1_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-1/ses-0/eeg/sub-1_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":698250,"duration_s":2793.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-1/ses-0/eeg/sub-1_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-1/ses-1/eeg/sub-1_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-1/ses-1/eeg/sub-1_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":698000,"duration_s":2792.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-1/ses-1/eeg/sub-1_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-2/ses-0/eeg/sub-2_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-2/ses-0/eeg/sub-2_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":697250,"duration_s":2789.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-2/ses-0/eeg/sub-2_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-2/ses-1/eeg/sub-2_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-2/ses-1/eeg/sub-2_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":697500,"duration_s":2790.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-2/ses-1/eeg/sub-2_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-3/ses-0/eeg/sub-3_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-3/ses-0/eeg/sub-3_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":697500,"duration_s":2790.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-3/ses-0/eeg/sub-3_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-3/ses-1/eeg/sub-3_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-3/ses-1/eeg/sub-3_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":697500,"duration_s":2790.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-3/ses-1/eeg/sub-3_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-4/ses-0/eeg/sub-4_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-4/ses-0/eeg/sub-4_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":698000,"duration_s":2792.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-4/ses-0/eeg/sub-4_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-4/ses-1/eeg/sub-4_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-4/ses-1/eeg/sub-4_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":603750,"duration_s":2415.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-4/ses-1/eeg/sub-4_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":175,"trial_types":{"baseline":35,"count":35,"letter":35,"math":35,"rotation":35}},{"path":"sub-5/ses-0/eeg/sub-5_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-5/ses-0/eeg/sub-5_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":695500,"duration_s":2782.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-5/ses-0/eeg/sub-5_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-5/ses-1/eeg/sub-5_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-5/ses-1/eeg/sub-5_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":693000,"duration_s":2772.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-5/ses-1/eeg/sub-5_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-6/ses-0/eeg/sub-6_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-6/ses-0/eeg/sub-6_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":698750,"duration_s":2795.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-6/ses-0/eeg/sub-6_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-6/ses-1/eeg/sub-6_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-6/ses-1/eeg/sub-6_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":697000,"duration_s":2788.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-6/ses-1/eeg/sub-6_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-7/ses-0/eeg/sub-7_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-7/ses-0/eeg/sub-7_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":698000,"duration_s":2792.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-7/ses-0/eeg/sub-7_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-7/ses-1/eeg/sub-7_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-7/ses-1/eeg/sub-7_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":611750,"duration_s":2447.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-7/ses-1/eeg/sub-7_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":175,"trial_types":{"baseline":35,"count":35,"letter":35,"math":35,"rotation":35}},{"path":"sub-8/ses-0/eeg/sub-8_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-8/ses-0/eeg/sub-8_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":700250,"duration_s":2801.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-8/ses-0/eeg/sub-8_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-8/ses-1/eeg/sub-8_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-8/ses-1/eeg/sub-8_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":696750,"duration_s":2787.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-8/ses-1/eeg/sub-8_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-9/ses-0/eeg/sub-9_ses-0_task-imagery_run-0_eeg.bdf","zarr":"sub-9/ses-0/eeg/sub-9_ses-0_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":700000,"duration_s":2800.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-9/ses-0/eeg/sub-9_ses-0_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}},{"path":"sub-9/ses-1/eeg/sub-9_ses-1_task-imagery_run-0_eeg.bdf","zarr":"sub-9/ses-1/eeg/sub-9_ses-1_task-imagery_run-0_eeg.zarr","updated_utc":"2026-09-04T12:48:18Z","source_tree":"raw","derived":false,"modalities":["eeg"],"groups":[{"name":"eeg_250hz","modality":"EEG","rate":250.0,"n_channels":30,"n_samples":699000,"duration_s":2796.0,"n_view_levels":6,"view_chunk_columns":1024,"source_rate_hz":256.0,"chunk_samples":1000,"shard_samples":75000}],"power_line_frequency":50.0,"units_report":{"converted":30,"relabelled":0,"kept_importer_unit":0,"units_column_present":true,"sidecar":"sub-9/ses-1/eeg/sub-9_ses-1_task-imagery_run-0_channels.tsv","sidecar_supplied":true},"n_events":200,"trial_types":{"baseline":40,"count":40,"letter":40,"math":40,"rotation":40}}],"failures":[],"pending":[],"events_parquet":"https://nemar.s3.us-east-2.amazonaws.com/nm000144/zarr/events.parquet","events_row_count":3550}