EEG data from an auditory oddball task

Data collection took place at the Meditation Research Institute (MRI) in Rishikesh, India under the supervision of Arnaud Delorme, PhD. The project was approved by the local MRI Indian ethical committee and the ethical committee of the University of California San Diego (IRB project # 090731).

Participants sat either on a blanket on the floor or on a chair for both experimental periods depending on their personal preference. They were asked to keep their eyes closed and all lighting in the room was turned off during data collection. An intercom allowed communication between the experimental and the recording room.

Participants performed three identical sessions of 13 minutes each. 750 stimuli were presented with 70% of them being standard (500 Hz pure tone lasting 60 milliseconds), 15% being oddball (1000 Hz pure tone lasting 60 ms) and 15% being distractors (1000 Hz white noise lasting 60 ms). All sounds took 5 milliseconds to ramp up and 5 milliseconds to ramp down. Sounds were presented at a rate of 1 per second with a random gaussian jitter of standard deviation 25 ms. Participants were instructed to respond to oddball by pressing a key on a keypad that was resting on their lap.

Data collection was performed with an Active Two Biosemi system (Biosemi, Inc.) at 1024Hz and 10-20 standard caps from the same company tailored to the subject’s head size. Stimuli were presented with the psychophysics MATLAB toolbox. The code for presenting stimuli and all the data is made available (see code and stimuli folder). Before making the data public, the raw data were resampled at 256 Hz using the standalone tool provided by Biosemi, then converted to the EEGLAB data format. No further data manipulation was performed.

本数据集的采集工作于印度瑞诗凯诗的冥想研究所（Meditation Research Institute, MRI）开展，由阿尔诺·德尔莫（Arnaud Delorme）博士负责监督。本项目已通过印度当地冥想研究所伦理委员会与加州大学圣地亚哥分校伦理委员会的伦理审查（机构审查委员会Institutional Review Board, IRB项目编号：090731）。
实验期间，受试者可根据自身偏好选择在地板铺毯就坐或使用座椅。数据采集过程中，要求受试者保持闭眼状态，且实验室内所有照明均关闭。实验控制室与记录室之间通过内部通话系统保持通讯联络。
受试者需完成3段完全相同的实验任务，每段时长13分钟。本次实验共呈现750个听觉刺激，其中70%为标准刺激（standard，500Hz纯音，时长60毫秒），15%为偏差刺激（oddball，1000Hz纯音，时长60毫秒），剩余15%为干扰刺激（distractors，1000Hz白噪音，时长60毫秒）。所有声音均采用5毫秒的上升沿与5毫秒的下降沿包络。刺激呈现速率为每秒1次，叠加标准差为25毫秒的高斯随机抖动（gaussian jitter）。实验要求受试者仅对偏差刺激做出反应，即按压放置于大腿上的键盘按键。
数据采集采用Active Two型Biosemi生物信号采集系统（Biosemi公司），采样率设置为1024Hz，同时使用该公司定制的适配受试者头围的10-20标准电极帽（10-20 standard caps）。刺激呈现通过心理物理学MATLAB工具箱（psychophysics MATLAB toolbox）实现。本研究已公开刺激呈现代码与全部实验数据集（详见代码与刺激文件夹）。数据公开前，我们使用Biosemi官方提供的独立工具将原始数据重采样至256Hz，并转换为EEGLAB标准格式，未对数据进行任何额外处理。

搜集汇总

背景与挑战

背景概述

该数据集是一个基于听觉oddball任务的脑电图（EEG）数据集，包含13名参与者在三个13分钟会话中采集的数据，任务涉及对标准音调、oddball音调和干扰噪音的反应，参与者需按键响应oddball音调。数据使用Biosemi系统以1024Hz采集，后降采样至256Hz并转换为EEGLAB格式，未进行额外处理，遵循BIDS标准，适用于事件相关电位（如P300）研究。