# The BMI-HDEEG dataset 4 (on004448)

## How to use the data (for agentic research)

### What it is

- **Modalities:** EEG
- **Participants:** 56
- **Size:** 38.2 GB
- **Tasks:** smrbmi

### License and terms

- **License:** [CC0](https://creativecommons.org/publicdomain/zero/1.0/)
- **Recommended citation:** Iwama, S., Morishige, M., Takahashi, Y., Hirose, R., Kodama, M., & Ushiba, J. (2026). The BMI-HDEEG dataset 4 (Version v1.0.0) \[Data set\]. NEMAR. https://doi.org/10.82901/nemar.on004448

### Where the bytes are

- **Latest version (always current):** [https://data.nemar.org/on004448/latest/](https://data.nemar.org/on004448/latest/)
- **This version (v1.0.0):** [https://data.nemar.org/on004448/v1.0.0/](https://data.nemar.org/on004448/v1.0.0/)

### How to download

- **The dataset:** `nemar dataset download on004448`. Clones and fetches in one step. Content under stimuli/ and derivatives/ is skipped by default because those trees can be large; add --stimuli --derivatives for the whole thing.
- **A subset, one step:** `nemar dataset download on004448 --subjects sub-01,02`. Also filters by --sessions, --tasks, --runs, --datatypes, --include and --exclude.
- **A subset, step 1:** `nemar dataset clone on004448`. Clones git-annex pointers only; fetches no file content. Creates ./on004448.
- **A subset, step 2:** `cd on004448`. The get command below reads the clone's annex, so it only works from inside the clone.
- **A subset, step 3:** `nemar dataset get <files>`. Pulls the files you actually need. Skips stimuli/ and derivatives/ unless the path you ask for is under one of them.
- **One small file:** [https://data.nemar.org/on004448/v1.0.0/participants.tsv](https://data.nemar.org/on004448/v1.0.0/participants.tsv). A direct HTTPS fetch works for any single file.

### Assess fit without downloading

- **Participants table:** [https://data.nemar.org/on004448/v1.0.0/participants.tsv](https://data.nemar.org/on004448/v1.0.0/participants.tsv)
- **Dataset description:** [https://data.nemar.org/on004448/v1.0.0/dataset_description.json](https://data.nemar.org/on004448/v1.0.0/dataset_description.json)
- **Directory listing:** [https://data.nemar.org/on004448/v1.0.0/?format=json](https://data.nemar.org/on004448/v1.0.0/?format=json)
- **Catalog record:** [https://api.nemar.org/datasets/on004448](https://api.nemar.org/datasets/on004448)