Epoch data

The epoch data are a fieldtrip format structure, all epochs are aligned with fixation onset to a given word, with the length of one second.Epochs were named as the combination of acquizaton date, subject code, and data type. Epochs that ended with 'Targ60' are from the first sentence set; ended with 'JEP60' are from the second sentence set (adapted from Degno et al. 2019, Journal of Experimental Psychology); ended with 'BL' were the baseline period of the first sentence set.This filed 'trialinfo' is the information about each trial, the header of all columns are as followings:1- sentence_id: sentence number for this epoch2- word_loc: the location of the current word in a sentence3- loc2targ:location distance between the current word and target word; loc2targ for pre-target, target, post-target are -1, 0, and 14- word_freq: CELEX frequency 5- word_length6- saccade2this_duration: saccade duration toward this word7- fixation_on_MEG: MEG trigger for fixation onset to this word8- fixation_duration 9- NextOrder: next word location minus the current word location; negative value indicates saccade backward to the previous words10- FirstPassFix: whether this fixation is the first for this word or not11- PreviousOrder: previous word location minus the current word location; negative value indicates saccade forward to the next words12- SentenceCondition: the current word is in a sentence with high or low frequency target word; 1 -- low, 2 -- high13- PupilSize: averaged pupil size during this fixation本数据集的试次（epoch）数据采用FieldTrip格式结构存储，所有试次均已对齐至目标单词的注视起始时刻，单试次时长为1秒。试次命名由采集日期、被试编号与数据类型组合而成：以'Targ60'结尾的试次来自第一句集；以'JEP60'结尾的试次来自第二句集（改编自Degno等人2019年发表于《Journal of Experimental Psychology》的研究）；以'BL'结尾的试次为第一句集的基线时段。 本数据集中的'trialinfo'字段存储了每个试次的相关信息，其各列表头如下： 1. 句子ID（sentence_id）：当前试次对应的句子编号 2. 单词位置（word_loc）：当前单词在句子中的位置序号 3. 目标间距（loc2targ）：当前单词与目标单词的位置差值；预目标词、目标词、后目标词的loc2targ值分别为-1、0、1 4. 词频（word_freq）：CELEX词频库中的词频数值 5. 单词长度（word_length）：当前单词的字符总数 6. 眼跳时长（saccade2this_duration）：指向当前单词的眼跳运动持续时间 7. MEG注视触发（fixation_on_MEG）：当前单词注视起始时刻对应的脑磁图（MEG）触发信号 8. 注视时长（fixation_duration）：本次注视的持续时间 9. 下位置差（NextOrder）：下一个单词位置与当前单词位置的差值；负值代表眼跳回退至前序单词 10. 首次注视标记（FirstPassFix）：标记该注视是否为当前单词的首次注视 11. 上位置差（PreviousOrder）：前一个单词位置与当前单词位置的差值；负值代表眼跳前进至后续单词 12. 句子条件（SentenceCondition）：标记当前单词所在句子的目标词词频类型，1对应低词频目标词，2对应高词频目标词 13. 瞳孔尺寸（PupilSize）：本次注视期间的平均瞳孔直径