{"dataset":{"id":"131","dataset_id":"nm000128","name":"Dong2023 – 59-subject 40-class SSVEP dataset","description":"A 59-subject steady-state visually evoked potential (SSVEP) dataset comprising 8-channel EEG recordings from healthy adolescents (aged 10-16 years) performing a 40-target SSVEP-based brain-computer interface task. The dataset includes 4 blocks of 160 trials per subject using joint frequency and phase modulation stimuli with frequencies ranging from 8.0 to 15.8 Hz, recorded at 250 Hz sampling rate from occipital electrodes. This resource supports the development and benchmarking of SSVEP decoding algorithms and BCI applications.","owner_user_id":19,"status":"active","github_repo":"nemarDatasets/nm000128","concept_doi":"10.82901/nemar.nm000128","latest_version_doi":"10.82901/nemar.nm000128.v1.0.2","created_at":"2026-03-06 21:32:01","updated_at":"2026-08-18 18:11:11","zenodo_concept_id":null,"is_sandbox":0,"visibility":"public","ezid_status":"public","enrichment_json":"{\n  \"version\": \"2.0\",\n  \"pipeline_stage\": \"validated\",\n  \"title\": \"Dong2023 – 59-subject 40-class SSVEP dataset\",\n  \"description\": \"A 59-subject steady-state visually evoked potential (SSVEP) dataset comprising 8-channel EEG recordings from healthy adolescents (aged 10-16 years) performing a 40-target SSVEP-based brain-computer interface task. The dataset includes 4 blocks of 160 trials per subject using joint frequency and phase modulation stimuli with frequencies ranging from 8.0 to 15.8 Hz, recorded at 250 Hz sampling rate from occipital electrodes. This resource supports the development and benchmarking of SSVEP decoding algorithms and BCI applications.\",\n  \"methods_description\": \"EEG data were acquired using a NeuSenW amplifier (Neuracle) with 8 semi-dry pre-gelled electrodes positioned around the occipital lobe (POz, PO3, PO4, PO7, PO8, Oz, O1, O2) according to the standard 10-05 montage, with reference at Fp1 and ground at Fp2. Signals were recorded at 1000 Hz and downsampled to 250 Hz. Each trial consisted of a 0.5 s pre-stimulus period, 4 s visual stimulation with JFPM flicker, and 0.5 s post-stimulus feedback interval. Subjects completed 4 blocks of 40 trials targeting a 4×10 matrix layout.\",\n  \"license\": \"CC BY-NC 4.0\",\n  \"dataset_type\": \"derivative\",\n  \"authors\": {\n    \"Yue Dong\": {},\n    \"Sen Tian\": {}\n  },\n  \"keywords\": [\n    {\n      \"term\": \"EEG\"\n    },\n    {\n      \"term\": \"steady-state visually evoked potential\"\n    },\n    {\n      \"term\": \"SSVEP\"\n    },\n    {\n      \"term\": \"brain-computer interface\"\n    },\n    {\n      \"term\": \"BCI\"\n    },\n    {\n      \"term\": \"visual perception\"\n    },\n    {\n      \"term\": \"adolescents\"\n    }\n  ],\n  \"related_identifiers\": [\n    {\n      \"identifier\": \"10.26599/BSA.2023.9050020\",\n      \"identifier_type\": \"DOI\",\n      \"relation_type\": \"IsDerivedFrom\"\n    },\n    {\n      \"identifier\": \"https://github.com/nemarDatasets/nm000128\",\n      \"identifier_type\": \"URL\",\n      \"relation_type\": \"IsDescribedBy\"\n    },\n    {\n      \"identifier\": 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13:24:49","source":null,"source_id":null,"subject_count":59,"modalities":"eeg","age_min":10,"age_max":16,"file_size":1117068168,"total_files":721,"tasks":"ssvep","metadata_columns_error":null,"staleness_warn_stage":null,"staleness_admin_notified_at":null,"authors":"Yue Dong, Sen Tian","license":"CC BY-NC 4.0","readme":"[![DOI](https://img.shields.io/badge/DOI-10.82901%2Fnemar.nm000128-blue)](https://doi.org/10.82901/nemar.nm000128)\n\n# 59-subject 40-class SSVEP dataset\n\n59-subject 40-class SSVEP dataset.\n\n## Dataset Overview\n\n- **Code**: Dong2023\n- **Paradigm**: ssvep\n- **DOI**: 10.26599/BSA.2023.9050020\n- **Subjects**: 59\n- **Sessions per subject**: 1\n- **Events**: 8=1, 8.2=2, 8.4=3, 8.6=4, 8.8=5, 9=6, 9.2=7, 9.4=8, 9.6=9, 9.8=10, 10=11, 10.2=12, 10.4=13, 10.6=14, 10.8=15, 11=16, 11.2=17, 11.4=18, 11.6=19, 11.8=20, 12=21, 12.2=22, 12.4=23, 12.6=24, 12.8=25, 13=26, 13.2=27, 13.4=28, 13.6=29, 13.8=30, 14=31, 14.2=32, 14.4=33, 14.6=34, 14.8=35, 15=36, 15.2=37, 15.4=38, 15.6=39, 15.8=40\n- **Trial interval**: [0.5, 4.5] s\n- **File format**: MAT\n\n## Acquisition\n\n- **Sampling rate**: 250.0 Hz\n- **Number of channels**: 8\n- **Channel types**: eeg=8\n- **Channel names**: POz, PO3, PO4, PO7, PO8, Oz, O1, O2\n- **Montage**: standard_1005\n- **Hardware**: NeuSenW (Neuracle)\n- **Reference**: Fp1\n- **Ground**: Fp2\n- **Sensor type**: semi-dry (pre-gelled)\n- **Line frequency**: 50.0 Hz\n\n## Participants\n\n- **Number of subjects**: 59\n- **Health status**: healthy\n- **Age**: mean=12.4, min=10, max=16\n- **Gender distribution**: male=37, female=22\n\n## Experimental Protocol\n\n- **Paradigm**: ssvep\n- **Task type**: SSVEP speller\n- **Number of classes**: 40\n- **Class labels**: 8, 8.2, 8.4, 8.6, 8.8, 9, 9.2, 9.4, 9.6, 9.8, 10, 10.2, 10.4, 10.6, 10.8, 11, 11.2, 11.4, 11.6, 11.8, 12, 12.2, 12.4, 12.6, 12.8, 13, 13.2, 13.4, 13.6, 13.8, 14, 14.2, 14.4, 14.6, 14.8, 15, 15.2, 15.4, 15.6, 15.8\n- **Trial duration**: 4.0 s\n- **Feedback type**: visual\n- **Stimulus type**: JFPM visual flicker\n- **Stimulus modalities**: visual\n- **Primary modality**: visual\n- **Synchronicity**: synchronous\n- **Mode**: offline\n- **Training/test split**: False\n\n## HED Event Annotations\n\nSchema: HED 8.4.0 | Browse: https://www.hedtags.org/hed-schema-browser\n\n```\n  8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/8\n\n  8.2\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/8_2\n\n  8.4\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/8_4\n\n  8.6\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/8_6\n\n  8.8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/8_8\n\n  9\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/9\n\n  9.2\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/9_2\n\n  9.4\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/9_4\n\n  9.6\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/9_6\n\n  9.8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/9_8\n\n  10\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/10\n\n  10.2\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/10_2\n\n  10.4\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/10_4\n\n  10.6\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/10_6\n\n  10.8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/10_8\n\n  11\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/11\n\n  11.2\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/11_2\n\n  11.4\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/11_4\n\n  11.6\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/11_6\n\n  11.8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/11_8\n\n  12\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/12\n\n  12.2\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/12_2\n\n  12.4\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/12_4\n\n  12.6\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/12_6\n\n  12.8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/12_8\n\n  13\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/13\n\n  13.2\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/13_2\n\n  13.4\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/13_4\n\n  13.6\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/13_6\n\n  13.8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/13_8\n\n  14\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/14\n\n  14.2\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/14_2\n\n  14.4\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/14_4\n\n  14.6\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/14_6\n\n  14.8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/14_8\n\n  15\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/15\n\n  15.2\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/15_2\n\n  15.4\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/15_4\n\n  15.6\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/15_6\n\n  15.8\n    ├─ Sensory-event\n    ├─ Experimental-stimulus\n    ├─ Visual-presentation\n    └─ Label/15_8\n\n```\n## Paradigm-Specific Parameters\n\n- **Detected paradigm**: ssvep\n- **Stimulus frequencies**: [8.0, 8.2, 8.4, 8.6, 8.8, 9.0, 9.2, 9.4, 9.6, 9.8, 10.0, 10.2, 10.4, 10.6, 10.8, 11.0, 11.2, 11.4, 11.6, 11.8, 12.0, 12.2, 12.4, 12.600000000000001, 12.8, 13.0, 13.2, 13.4, 13.600000000000001, 13.8, 14.0, 14.2, 14.4, 14.600000000000001, 14.8, 15.0, 15.2, 15.4, 15.600000000000001, 15.8] Hz\n- **Frequency resolution**: 0.2 Hz\n\n## Data Structure\n\n- **Trials**: 160\n- **Blocks per session**: 4\n\n## Preprocessing\n\n- **Data state**: epoched\n- **Downsampled to**: 250.0 Hz\n\n## Signal Processing\n\n- **Classifiers**: FBCCA, eTRCA, msTRCA\n- **Spatial filters**: CCA, TRCA\n\n## Cross-Validation\n\n- **Method**: leave-one-block-out\n- **Folds**: 4\n- **Evaluation type**: within_subject\n\n## BCI Application\n\n- **Environment**: non-shielded\n- **Online feedback**: True\n\n## Tags\n\n- **Pathology**: healthy\n- **Modality**: visual\n- **Type**: perception\n\n## Documentation\n\n- **DOI**: 10.26599/BSA.2023.9050020\n- **License**: CC BY-NC 4.0\n- **Investigators**: Yue Dong, Sen Tian\n- **Senior author**: Yue Dong\n- **Institution**: Jiangsu JITRI Brain Machine Fusion Intelligence Institute\n- **Country**: CN\n- **Repository**: Zenodo\n- **Data URL**: https://zenodo.org/records/18847318\n- **Publication year**: 2023\n\n## References\n\nY. Dong and S. Tian, \"A large database towards user-friendly SSVEP-based BCI,\" Brain Science Advances, vol. 9, no. 4, pp. 297-309, 2023. DOI: 10.26599/BSA.2023.9050020\nAppelhoff, S., Sanderson, M., Brooks, T., Vliet, M., Quentin, R., Holdgraf, C., Chaumon, M., Mikulan, E., Tavabi, K., Hochenberger, R., Welke, D., Brunner, C., Rockhill, A., Larson, E., Gramfort, A. and Jas, M. (2019). MNE-BIDS: Organizing electrophysiological data into the BIDS format and facilitating their analysis. Journal of Open Source Software 4: (1896). https://doi.org/10.21105/joss.01896\n\nPernet, C. R., Appelhoff, S., Gorgolewski, K. J., Flandin, G., Phillips, C., Delorme, A., Oostenveld, R. (2019). EEG-BIDS, an extension to the brain imaging data structure for electroencephalography. 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