数据集 | BCI Challenge @ NER 2015

This BCI Challenge is being proposed as part of the IEEE Neural Engineering Conference (NER2015).

问题描述

在这次的竞赛中，我们提供人在只注意视觉刺激情况下拼写单词的脑电数据。比赛的目标是检测被试在拼写任务中的错误。

设置
使用P300拼写器，36个字符（字母或数字）呈现在屏幕上，目标是根据被试收到反馈后的脑电信号确定所选字符是否正确。

实验设计
使用两种拼写方案：

1. 快速模式，更容易出错（每个字符闪烁4次）
2. 慢速模式，不容易出错（每个字符闪烁8次）

在最后一次闪烁之后，被试继续观察屏幕等待反馈，反馈内容为所选字符的放大。即使获得的反馈是错误的，要求被试继续下一个字符的拼写。

一共26个被试（13名男性，13名女性，年龄范围20~37，平均年龄28.8±5.4）。所有被试的视力正常或者矫后正常，无P300或其他脑机接口经验。56通道Ag/AgCl脑电传感器记录脑电信号，位置为国际10-20系统，采样率600Hz，以鼻子为参考，接地端在肩膀，阻抗保持在10KΩ以下。

被试需要经历5次拼写，前4次每次拼写由12个5个字母的单词组成，第5次由20个5个字母的单词组成。

数据集

200Hz频率下采样、EOG检测眼动信号

数据文件

从上到下依次为：

• 通道位置
• 数据提交格式
• 训练标签 （训练集的标签）
• 测试集 （10个其他被试的数据，5次训练，50个数据文件）
• 训练集（16个被试，5次训练，80个数据文件，前4次训练每次训练60个反馈，第5次100个）

数据字段

‘通道位置’文件包含3个字段：

1. 标签：通道名称
2. 半径：电极位置极坐标半径
3. Phi：电极位置极坐标角度

‘训练集’和‘数据集’文件包含以下字段：

• Time: Timestamp of each sample（采样时间戳）
• Fp1: EEG samples recorded from Fp1（Fp1电极记录的信号）
• Fp2: EEG samples recorded from Fp2
• AF7: EEG samples recorded from AF7
• AF3: EEG samples recorded from AF3
• AF4: EEG samples recorded from AF4
• AF8: EEG samples recorded from AF8
• F7: EEG samples recorded from F7
• F5: EEG samples recorded from F5
• F3: EEG samples recorded from F3
• F1: EEG samples recorded from F1
• Fz: EEG samples recorded from Fz
• F2: EEG samples recorded from F2
• F4: EEG samples recorded from F4
• F6: EEG samples recorded from F6
• F8: EEG samples recorded from F8
• FT7: EEG samples recorded from FT7
• FC5: EEG samples recorded from FC5
• FC3: EEG samples recorded from FC3
• FC1: EEG samples recorded from FC1
• FCz: EEG samples recorded from FCz
• FC2: EEG samples recorded from FC2
• FC4: EEG samples recorded from FC4
• FC6: EEG samples recorded from FC6
• FT8: EEG samples recorded from FT8
• T7: EEG samples recorded from T7
• C5: EEG samples recorded from C5
• C3: EEG samples recorded from C3
• C1: EEG samples recorded from C1
• Cz: EEG samples recorded from Cz
• C2: EEG samples recorded from C2
• C4: EEG samples recorded from C4
• C6: EEG samples recorded from C6
• T8: EEG samples recorded from T8
• TP7: EEG samples recorded from TP7
• CP5: EEG samples recorded from CP5
• CP3: EEG samples recorded from CP3
• CP1: EEG samples recorded from CP1
• CPz: EEG samples recorded from CPz
• CP2: EEG samples recorded from CP2
• CP4: EEG samples recorded from CP4
• CP6: EEG samples recorded from CP6
• TP8: EEG samples recorded from TP8
• P7: EEG samples recorded from P7
• P5: EEG samples recorded from P5
• P3: EEG samples recorded from P3
• P1: EEG samples recorded from P1
• Pz: EEG samples recorded from Pz
• P2: EEG samples recorded from P2
• P4: EEG samples recorded from P4
• P6: EEG samples recorded from P6
• P8: EEG samples recorded from P8
• PO7: EEG samples recorded from PO7
• POz: EEG samples recorded from POz
• P08: EEG samples recorded from P08
• O1: EEG samples recorded from O1
• O2: EEG samples recorded from O2
• EOG: samples recorded from EOG derivation（EOG记录的眼动信号）
• FeedBackEvent: a zero vector except for each occurring feedback timestamp for which value is equal to one

‘标签’文件包含2个字段：

1. IdFeedBack：反馈标识（S01 Sess01 FB001对应于被试1的第1次试验中的第1个反馈）
2. 预测信息：错误与正确分别为0和1

数据集地址