---
pretty_name: "Kim2025 – 40-class beta-range SSVEP speller dataset"
license: cc-by-4.0
tags:
  - eeg
  - neuroscience
  - eegdash
  - brain-computer-interface
  - pytorch
  - visual
  - perception
size_categories:
  - n<1K
task_categories:
  - other
---

# Kim2025 – 40-class beta-range SSVEP speller dataset

**Dataset ID:** `nm000127`

_Kim2025_SSVEP_

**Canonical aliases:** `Kim2025`

> **At a glance:** EEG · Visual perception · healthy · 40 subjects · 240 recordings · CC BY 4.0

## Load this dataset

This repo is a **pointer**. The raw EEG data lives at its canonical source
(OpenNeuro / NEMAR); [EEGDash](https://github.com/eegdash/EEGDash) streams it
on demand and returns a PyTorch / braindecode dataset.

```python
# pip install eegdash
from eegdash import EEGDashDataset

ds = EEGDashDataset(dataset="nm000127", cache_dir="./cache")
print(len(ds), "recordings")
```

You can also load it by canonical alias — these are registered classes in `eegdash.dataset`:

```python
from eegdash.dataset import Kim2025
ds = Kim2025(cache_dir="./cache")
```

If the dataset has been mirrored to the HF Hub in braindecode's Zarr layout,
you can also pull it directly:

```python
from braindecode.datasets import BaseConcatDataset
ds = BaseConcatDataset.pull_from_hub("EEGDash/nm000127")
```


## Dataset metadata

| | |
|---|---|
| **Subjects** | 40 |
| **Recordings** | 240 |
| **Tasks (count)** | 1 |
| **Channels** | 31 (×240) |
| **Sampling rate (Hz)** | 1024 (×240) |
| **Total duration (h)** | 18.9 |
| **Size on disk** | 8.1 GB |
| **Recording type** | EEG |
| **Experimental modality** | Visual |
| **Paradigm type** | Perception |
| **Population** | Healthy |
| **Source** | nemar |
| **License** | CC BY 4.0 |

## Links

- **NEMAR:** [nm000127](https://nemar.org/dataexplorer/detail?dataset_id=nm000127)
- **Browse 700+ datasets:** [EEGDash catalog](https://huggingface.co/spaces/EEGDash/catalog)
- **Docs:** <https://eegdash.org>
- **Code:** <https://github.com/eegdash/EEGDash>

---

_Auto-generated from [dataset_summary.csv](https://github.com/eegdash/EEGDash/blob/main/eegdash/dataset/dataset_summary.csv) and the [EEGDash API](https://data.eegdash.org/api/eegdash/datasets/summary/nm000127). Do not edit this file by hand — update the upstream source and re-run `scripts/push_metadata_stubs.py`._