ERPs to transitions in facial expression: experiment 1

These are 32 channel EEG raw data files (with blinks removed) recorded from 19 (anonymous) young adult participants. Full details of methods are given in a paper currently accepted for publication in PLoS One, which compares ERPs and recognition scores to dynamic changes in face images of 10 individuals (JAFFE dataset, link below). In Expt. 1, changes in emotional facial expression (angry/neutral or neutral/angry) are compared with changes in magnification (larger/smaller or smaller/larger). The .cnt files are in Neuroscan Scan 3.3 format. Electrode locations are standard 10/20 locations for the 32 channel quik-cap. Stimulus events coincide with the instantaneous transition between two 500ms duration face images.The event codes are as follows: 46 = neutral-angry; 47 = neutral-magnified; 55 = angry-neutral, 56 = magnified-neutral.  Response events are button presses indicating perceived change type: 33 = emotional expression change, 34 = magnification change. Neuroscan files can be read by open access software such as  EEGlab, SPM or Brainstorm (links below) as well as Neuroscan proprietary software.Rejected data for 1 participant is included in a separate zip file: it was rejected due to an erroneous 1Hz high pass filter setting during data acquisition.The excel file  revised_angryzoom_xls contains paired t-values (group level t-map) for comparison of experimental conditions. Columns represent electrodes and rows time samples (downsampled to 15 ms/sample by spline interpolation). The data corresponds to Fig 3. The corresponding excel file for experiment 2 contains the formulae to convert t-values into uncorrected p-values and format the data for FDR correction using a spreadsheet available from:

Pike N. Using false discovery rates
for multiple comparisons in ecology and evolution. Method Ecol
Evol 2010; 2: 278-282.

本数据集包含32通道脑电图（EEG）原始数据文件（已去除眨眼数据），由19位（匿名）青年参与者提供。详细的方法描述已收录于即将在《PLoS One》期刊上发表的论文中，该论文通过对比个体面部图像（JAFFE数据集，链接见下文）的动态变化与事件相关电位（ERP）和识别分数，探讨了情感面部表情（愤怒/中性或中性/愤怒）的变化与放大倍数（放大/缩小或缩小/放大）的变化之间的关系。在实验1中，情感面部表情的变化与放大倍数的变化进行了比较。.cnt文件采用Neuroscan Scan 3.3格式。电极位置采用32通道quik-cap的标准10/20系统。刺激事件与两个500毫秒持续时间的面部图像之间的瞬时转换相一致。事件代码如下：46 = 中性-愤怒；47 = 中性-放大；55 = 愤怒-中性；56 = 放大-中性。响应事件是按钮按压，表示感知到的变化类型：33 = 情感表情变化；34 = 放大倍数变化。Neuroscan文件可以通过如EEGlab、SPM或Brainstorm等开放访问软件以及Neuroscan专有软件读取。1位参与者的拒绝数据包含在一个单独的zip文件中：由于数据采集过程中设置了错误的1Hz高通滤波器，因此被拒绝。修订后的愤怒放大_xls电子表格文件包含了实验条件下配对t值（组水平t图），用于比较电极和时间样本（通过样条插值降采样至每样本15毫秒）。数据对应于图3。实验2对应的电子表格文件包含了将t值转换为未校正p值以及格式化数据以进行FDR校正的公式。具体方法可参考Pike N.在生态学和进化论中应用错误发现率进行多重比较的方法论，发表于2010年《方法生态学与进化》第2期，第278-282页。