alexeykashevnik/EEGMeditation

A simultaneous electroencephalography, electrocardiography, and RGB video dataset of yoga practicioners during concentration and mind wandering tasks

This dataset contains raw multimodal recordings from yoga practitioners and control participants during resting state, mind-wandering, and concentration tasks. The primary data are continuous EEG recordings (BrainVision format). ECG is recorded concurrently and stored as an additional channel within the same BrainVision files when available. Some sessions also have synchronized frontal video recordings (MP4) when available.

The dataset is intended for research on attention, concentration, mind-wandering, meditation/yoga practice effects, and multimodal physiological signal analysis.

Participants???

• Total participants: 33
• Consent & anonymization: All participants provided informed consent for anonymized open publication. No personally identifiable information is included.

Participant-level metadata (group, age, sex, experience, sleep, and subjective concentration ratings) are provided in dataset tables.

Experimental setup

Participants sat in front of a workstation display (2560×1440) at ~65–70 cm. Stimuli/instructions were presented with EventIDE, and event markers were streamed to the EEG system via Lab Streaming Layer (LSL).

EEG was recorded using an ANT Neuro eego mylab (EE-225) amplifier with 64 electrodes placed according to the international 10–10 system. ECG was recorded in a bipolar configuration using dry electrodes on both wrists. When video is present, it is a frontal recording capturing face and chest.

Tasks / protocol

Each session includes five consecutive tasks (no breaks):

1. Resting state (Task 1) – 4 blocks, 2 minutes each:
   • Eyes open → eyes closed → eyes open → eyes closed
2. Mind-wandering (Task 2) – 10 minutes, eyes closed:
   • Let thoughts flow freely; try not to fall asleep
3. Internal concentration (Task 3) – 15 minutes, eyes closed:
   • Focus attention on the center of the forehead; gently return attention when distracted
4. External concentration (Task 4) – up to 10 minutes:
   • Visual search (“find-the-character”) across up to 4 images, verbally confirm target found
5. Resting state (Task 5) – same as Task 1:
   • Eyes open → eyes closed → eyes open → eyes closed

General instruction for all tasks: stay as still as possible, minimize blinking, and avoid eye rotations.

Data contents

EEG (primary modality)

• Format: BrainVision (.vhdr, .vmrk, .eeg)
• Recording type: continuous
• Sampling frequency: 2048 Hz
• Channels: 64 EEG channels (10–10 placement)
• Event markers: stored in BrainVision marker file and mirrored in BIDS *_events.tsv

ECG (when available)

• Stored as an additional channel inside the same BrainVision recording
• Can be accessed/extracted like any other channel time series

Video (when available)

• Format: MP4 (frontal video of face and chest)
• Typical recording settings in the original acquisition: 1920×1080, 30 fps
• Video may be missing for some recordings due to quality/eligibility criteria

Dataset organization

Data are organized according to BIDS.

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license: cc-by-4.0