nm000252 NEMAR-native dataset

Imagined speech EEG dataset — long words condition (Nguyen et al. 2017)

EEG recordings from six healthy participants performing imagined speech of long words, comprising two word classes (cooperate and independent), with 64 channels recorded at 256 Hz. Trials were cued by auditory beeps and visual cues, and the data were analyzed with Riemannian manifold covariance features and relevance vector machines for brain-computer interface classification. The dataset is re-hosted in BIDS format from the MOABB benchmark collection.

EEG

Issues GitHub

Download this dataset

Pick a method. Large datasets skip the zip and use the streaming methods below — all resumable. Full download guide →

Download archive (.zip) — 1.3 GB
A single zip of the published version. Best for small/medium datasets.

Download zip
NEMAR CLI recommended
Pulls the pinned version + annexed data and resumes cleanly. Install nemar-cli →
```
nemar dataset download nm000252
```

DataLad

Clone the dataset repo and fetch file content on demand. Docs →

datalad clone https://github.com/nemarDatasets/nm000252 nm000252
cd nm000252 && datalad get .

git-annex

Plain git + git-annex against the dataset repo. Docs →

git clone https://github.com/nemarDatasets/nm000252 nm000252
cd nm000252 && git annex get .

Direct files (wget / curl / rclone)
Every file with a stable, range-resumable URL from the manifest. Needs curl, jq, wget (or rclone/aria2c). Docs →
```
curl -s https://data.nemar.org/nm000252/v1.0.3/manifest.json | jq -r '.[].bytes_url' > urls.txt
wget -xc -i urls.txt
```

Compute on this dataset

Two routes today, with a third (in-browser one-click submission) landing soon.

NeuroScience Gateway (NSG) portal.
NSG runs EEGLAB / Brainstorm / MNE pipelines on supercomputing time donated by SDSC. Create an account, point a job at this dataset's S3 prefix (s3://nemar/nm000252), and submit.
nsgportal.org →
Local processing with nemar-cli.
Pull the dataset to your machine and run any toolbox locally. Honors the published version pinning.
```
npm install -g nemar-cli
nemar dataset clone nm000252
cd nm000252 && nemar dataset get
```
Just the files.
rclone, aria2c, or any HTTPS client works against data.nemar.org/nm000252/ — the manifest carries presigned S3 URLs.

Direct compute access is coming soon. One-click NSG submission from this page is scoped for a follow-up phase. Tracked on nemarOrg/website#6.

Loading demographics…

Files

Loading file index…

How to use the data (for agentic research) license, citation, download commands

What it is

Modalities: EEG
Participants: 6
Size: 1.27 GB
Tasks: imagery

License and terms

License: other-open
Recommended citation: Nguyen, C. H., Karavas, G. K., & Artemiadis, P. (2026). Imagined speech EEG dataset — long words condition (Nguyen et al. 2017) (Version v1.0.3) [Data set]. NEMAR. https://doi.org/10.82901/nemar.nm000252

Where the bytes are

Latest version (always current): https://data.nemar.org/nm000252/latest/
This version (v1.0.3): https://data.nemar.org/nm000252/v1.0.3/

How to download

The dataset: nemar dataset download nm000252 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 nm000252 --subjects sub-01,02 Also filters by --sessions, --tasks, --runs, --datatypes, --include and --exclude.
A subset, step 1: nemar dataset clone nm000252 Clones git-annex pointers only; fetches no file content. Creates ./nm000252.
A subset, step 2: cd nm000252 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/nm000252/v1.0.3/participants.tsv A direct HTTPS fetch works for any single file.

Assess fit without downloading

Participants table: https://data.nemar.org/nm000252/v1.0.3/participants.tsv
Dataset description: https://data.nemar.org/nm000252/v1.0.3/dataset_description.json
Directory listing: https://data.nemar.org/nm000252/v1.0.3/?format=json
Catalog record: https://api.nemar.org/datasets/nm000252