---
license: cc0-1.0
tags:
- eeg
- bci
- brain-computer-interface
pretty_name: AI4Sci BCI decoding — public tracks (AD65, OpenBMI, Longitudinal)
---
# AI4Sci brain-computer-interface decoding: public tracks

Prepared data for three of the five tracks of the `brain-computer-interface-decoding` task in
[T0-RSI/ai4sci-tasks](https://github.com/T0-RSI/ai4sci-tasks) and
[sunnweiwei/science-speedrun](https://github.com/sunnweiwei/science-speedrun). Each was built by
the task's `environment/data/materialize.py` from pinned public sources:

| track | source | classes | shape (channels, seconds, 200 Hz) | train / val / test windows |
| --- | --- | --- | --- | --- |
| `ad65` | [OpenNeuro ds004504](https://openneuro.org/datasets/ds004504) derivatives (CC0) | 3: Alzheimer's, frontotemporal dementia, control | 19 × 10 × 200 | 3,774 / 1,343 / 1,376 |
| `openbmi` | [GigaDB 100542](https://gigadb.org/dataset/100542) motor-imagery sessions (CC0) | 2: left, right | 62 × 4 × 200 | 12,800 / 4,400 / 4,400 |
| `longitudinal` | [OpenNeuro ds007176](https://openneuro.org/datasets/ds007176) (CC0) | 2: eyes closed, open | 58 × 2 × 200 | 28,523 / 8,418 / 10,028 |

Subjects are split with seed 3407 (test 20%, then validation 25% of the rest; AD65 stratified by
diagnosis); every session stays with its subject. Arrays are float32 microvolts in NumPy shards.

```text
runtime/development/<track>/{train,val}/   manifest.json (id, label, subject, session, path, index), shards
runtime/private/<track>/public/            test inputs: manifest without labels, shards in random order
runtime/private/<track>/truth.jsonl        test labels, subjects and sessions (verifier only)
records/<track>/                           subject splits, preprocessing statistics, build receipt
release-manifest.json                      size and SHA-256 of every file
```

The FACED and TUEV tracks are not redistributable and come from a separate controlled-access
release. The task's `environment/data/materialize.sh release ROOT` installs all five tracks and
verifies every file against `release-manifest.json`. Only `runtime/development` may be mounted
into an agent's workspace; `runtime/private` is for the verifier.

Citations: Miltiadous et al. (2023), *Data* 8(6), 95 (ds004504); Lee et al. (2019),
*GigaScience* 8(5), giz002 (OpenBMI); OpenNeuro ds007176.