# Kim beta-range SSVEP · 40 targets, 14.0–21.8 Hz (Figshare 28806815): EEG decoding results

40-target SSVEP speller, 14.0 to 21.8 Hz

Kim beta-range SSVEP (Figshare 28806815) is the release of a 40-target SSVEP speller study with its stimuli in the beta range, described by Heegyu Kim, Kyungho Won, Minkyu Ahn and Sung Chan Jun in Scientific Data (2025) and deposited by Heegyu Kim under CC BY 4.0. Besides the task recordings, the record holds rest and questionnaire files; only the 40 task files are used here.

**Also known as** Kim2025BetaRange · Figshare 28806815 · doi:10.1038/s41597-025-06032-2

- Forty-target SSVEP speller selection with stimuli from 14.0 to 21.8 Hz, six blocks per person on one day.
- Cohort: 40 participants, 240 blocks, 9,600 trials.
- All 40 task files passed their MD5 checks; the rest and questionnaire files were not acquired. The files store the targets in the order 14 + j + 0.2·i Hz, which differs from the ascending list in MOABB’s metadata, and the references follow the stored order.
- Figshare record 28806815, version 3, the latest of the 3 versions the record lists.

Description sources [doi.org](https://doi.org/10.6084/m9.figshare.28806815.v3) · [www.nature.com](https://www.nature.com/articles/s41597-025-06032-2)

## Where it appears

- [What do the files show once a public EEG dataset is checked end to end?](https://bci.report/topics/data-quality/#kim2025-beta-range)

The training-free CCA baseline, with its intake, the checks run before any score, its caveats and its hold, is the worked case on the data-quality page: [What does training-free CCA give on 40 frequencies in the beta range? →](https://bci.report/topics/data-quality/#kim2025-beta-range)

## Published results

Each figure comes from the reviewed download linked in its group. One row is above another only where their 95% intervals do not overlap.

### Data quality · which of 40 targets, with no training

Source page: [Checked end to end](https://bci.report/topics/data-quality/#kim2025-beta-range) · Chance level 2.50% · [dataset-checks-update.json](https://bci.report/data/dataset-checks-update.json)

| Method | Condition | Metric | Value | People |
| --- | --- | --- | --- | --- |
| CCA (no training) | 40 targets, 14.0–21.8 Hz · a nominal 2-second window from the stored onset, 11 channels | Accuracy | 53.40% (45.89%–61.01%) | 40 |

## Source and licence

### Kim beta-range SSVEP · 40 targets, 14.0–21.8 Hz (Figshare 28806815)

**Credit** Heegyu Kim · SSVEP 40class dataset, figshare, doi:10.6084/m9.figshare.28806815.v3, CC BY 4.0. Paper: Heegyu Kim, Kyungho Won, Minkyu Ahn and Sung Chan Jun, A 40-Class SSVEP Speller Dataset: Beta Range Stimulation for Low-Fatigue BCI Applications, Scientific Data 12:1751 (2025), doi:10.1038/s41597-025-06032-2. Modifications: the 40 task files only; the mean of M1 and M2 subtracted, 11 channels, a 2-second window and a band-pass filter inside it; no data redistributed. Derived analysis by BCI Report; not endorsed by the authors.

[CC BY 4.0 ↗](https://creativecommons.org/licenses/by/4.0/) · [Dataset record ↗](https://doi.org/10.6084/m9.figshare.28806815.v3)

BCI Report does not redistribute any recording. These are aggregate measurements computed by BCI Report under the licence above; the data remain their creators’.

### Ethics and consent, as the source states them

**Ethics approval:** “The Institutional Review Board at Gwangju Institute of Science and Technology (GIST) approved this experiment (20211201-HR-64-02-04)”

**Informed consent:** “all subjects were informed of all experimental procedures and signed consent forms”

The data descriptor also states: “All research data has been consented to by participants, with explicit agreement for public sharing.”

The confidentiality clause of the consent forms excludes questionnaire-related personal data; the research acquired the 40 task files only and excluded the questionnaire and rest files.

The paper’s Data availability links version 2; the research used version 3 (the latest), which adds a questionnaire. Both versions carry CC BY 4.0 in the licence field.

[Data descriptor, with its ethics statement ↗](https://www.nature.com/articles/s41597-025-06032-2)

[Row in the open register →](https://bci.report/datasets/register/#r-site-kim2025-beta-range)

[All datasets →](https://bci.report/datasets/) · [All methods →](https://bci.report/methods/)

## Cite this page

BCI Report (2026). *Kim beta-range SSVEP · 40 targets, 14.0–21.8 Hz (Figshare 28806815): EEG decoding results*. https://bci.report/datasets/kim2025-beta-range/

Figures from release [`dataset-checks-update-20261028`](https://bci.report/releases/#dataset-checks-update-20261028) (2026-10-28). Cite the upstream dataset as well: its credit is on this page.

Every release is archived on Zenodo: [doi:10.5281/zenodo.23123296](https://doi.org/10.5281/zenodo.23123296). [BibTeX for the site and its releases →](https://bci.report/api/#cite-heading) · [CITATION.cff ↗](https://raw.githubusercontent.com/twu3202/bci-report/main/CITATION.cff)

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Markdown copy of https://bci.report/datasets/kim2025-beta-range/, generated from the published page. Figures are aggregate results; terms of use: https://bci.report/data-use/