# WBCIC-SHU motor imagery dataset: EEG decoding results

Motor imagery across three recording sessions: two-class and three-class cohorts, kept apart

The WBCIC-SHU motor imagery dataset (Figshare+ 22671172) holds EEG from 62 healthy participants, each recorded in three sessions with the same motor-imagery paradigm: 51 in a two-class task (left- or right-hand grasping) and 11 in a three-class task that adds foot-hooking. It was collected at the 2019 World Robot Conference BCI robot contest with a 64-channel wireless Neuracle cap at 1,000 Hz, and the release holds raw data, a processed derivative and code. Released by Banghua Yang and Fenqi Rong (Shanghai University) and described in Scientific Data (2025). Only the processed derivative of sessions 1 and 3 is used here.

**Also known as** WBCIC-SHU · WBCIC-SHU Motor Imagery Dataset · WBCIC_SHU Motor Imagery dataset · Figshare+ 22671172 · A multi-day and high-quality EEG dataset for motor imagery brain-computer interface · Yang et al. (2025)

Description sources [doi.org](https://doi.org/10.25452/figshare.plus.22671172.v5) · [doi.org](https://doi.org/10.1038/s41597-025-04826-y) · [api.figshare.com](https://api.figshare.com/v2/articles/22671172/versions/5)

## Where it appears

- [Does a decoder trained on an earlier session still work later?](https://bci.report/topics/later-sessions/#wbcic-shu)

## Published results

Every figure below is copied from a reviewed download, not recomputed for this page.

### Later sessions · two-class motor imagery, session 1 to session 3

Read with its protocol: [Later sessions](https://bci.report/topics/later-sessions/#wbcic-shu) · Chance level 50.0% · [later-sessions-update.json](https://bci.report/data/later-sessions-update.json)

**Balanced accuracy, 2 configurations.** Dot: the estimate; line: 95% interval; dashed line: chance level where the payload records one.

- Relative spectral power + ridge: 53.9% (52.7%–55.1%)
- CBraMod · frozen encoder, session-1 ridge readout: 67.7% (64.8%–70.5%)

| Method | Condition | Metric | Value | People |
| --- | --- | --- | --- | --- |
| Source-majority prior — reference or comparator, not a decoding model | Session 1 → session 3 · no session-3 labels | Balanced accuracy | 50.0% — One over the number of classes: a floor, not a model. | 51 |
| Relative spectral power + ridge | Session 1 → session 3 · no session-3 labels | Balanced accuracy | 53.9% (52.7%–55.1%) | 51 |
| Relative spectral power + ridge | Minus the source prior, the same people and trials | Paired difference | +3.9 pp (+2.7 pp–+5.1 pp) | 51 |
| [CBraMod · frozen encoder, session-1 ridge readout](https://bci.report/methods/cbramod/) | Session 1 → session 3 · no session-3 labels | Balanced accuracy | 67.7% (64.8%–70.5%) | 51 |
| [CBraMod · frozen encoder, session-1 ridge readout](https://bci.report/methods/cbramod/) | Minus the relative spectral ridge, the same people and trials | Paired difference | +13.8 pp (+11.3 pp–+16.4 pp) — A comparison of two fixed pipelines on reused test trials; it does not show that pretraining caused the gain, and whether this checkpoint saw WBCIC-SHU in pretraining is not established. | 51 |

### Later sessions · three-class motor imagery, session 1 to session 3

Read with its protocol: [Later sessions](https://bci.report/topics/later-sessions/#wbcic-shu) · Chance level 33.3% · [later-sessions-update.json](https://bci.report/data/later-sessions-update.json)

**Balanced accuracy, 2 configurations.** Dot: the estimate; line: 95% interval; dashed line: chance level where the payload records one.

- Relative spectral power + ridge: 37.6% (35.4%–40.0%)
- CBraMod · frozen encoder, session-1 ridge readout: 51.6% (45.2%–58.3%)

| Method | Condition | Metric | Value | People |
| --- | --- | --- | --- | --- |
| Source-majority prior — reference or comparator, not a decoding model | Session 1 → session 3 · no session-3 labels | Balanced accuracy | 33.3% — One over the number of classes: a floor, not a model. | 11 |
| Relative spectral power + ridge | Session 1 → session 3 · no session-3 labels | Balanced accuracy | 37.6% (35.4%–40.0%) | 11 |
| Relative spectral power + ridge | Minus the source prior, the same people and trials | Paired difference | +4.3 pp (+2.1 pp–+6.6 pp) | 11 |
| [CBraMod · frozen encoder, session-1 ridge readout](https://bci.report/methods/cbramod/) | Session 1 → session 3 · no session-3 labels | Balanced accuracy | 51.6% (45.2%–58.3%) | 11 |
| [CBraMod · frozen encoder, session-1 ridge readout](https://bci.report/methods/cbramod/) | Minus the relative spectral ridge, the same people and trials | Paired difference | +14.0 pp (+7.5 pp–+20.8 pp) — A comparison of two fixed pipelines on reused test trials; it does not show that pretraining caused the gain, and whether this checkpoint saw WBCIC-SHU in pretraining is not established. | 11 |

## Source and licence

### WBCIC-SHU motor imagery dataset

**Credit** Banghua Yang, Fenqi Rong, Yunlong Xie, Du Li, Jiayang Zhang, Fu Li, Guangming Shi and Xiaorong Gao · A multi-day and high-quality EEG dataset for motor imagery brain-computer interface, Scientific Data 12, 488 (2025), doi:10.1038/s41597-025-04826-y. Data: Banghua Yang and Fenqi Rong, WBCIC-SHU Motor Imagery Dataset, Figshare+, doi:10.25452/figshare.plus.22671172.v5, CC BY 4.0. 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/10.25452/figshare.plus.22671172.v5)

BCI Report does not redistribute any recording. These are aggregate measurements computed by BCI Report under the licence above; the data belong to the people credited.

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

## Cite this page

BCI Report (2026). *WBCIC-SHU motor imagery dataset: EEG decoding results*. https://bci.report/datasets/wbcic-shu/

Figures from release [`later-sessions-update-20261008`](https://bci.report/releases/#later-sessions-update-20261008) (2026-10-08). 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/wbcic-shu/, generated from the published page. Figures are aggregate results; terms of use: https://bci.report/data-use/