Wilding E L, Rugg M D
Wellcome Brain Research Group, School of Psychology, University of St Andrews, Fife, U.K.
Neuropsychologia. 1997 Sep;35(9):1185-95. doi: 10.1016/s0028-3932(97)00048-1.
Subjects made old/new recognition judgements to visually presented words, half of which had been encountered in a prior study phase. For each word judged old, subjects made a subsequent source judgement, indicating whether they had pronounced the word aloud at study (spoken words), or whether they had heard the word spoken to them (heard words). Event-related potentials (ERPs) were compared for three classes of test item; words correctly judged to be new (correct rejections), and spoken and heard words that were correctly assigned to source (spoken hit/hit and heard hit/hit response categories). Consistent with previous findings (Wilding, E. L. and Rugg, M. D., Brain, 1996, 119, 889-905), two temporally and topographically dissociable components, with parietal and frontal maxima respectively, differentiated the ERPs to the hit/hit and correct rejection response categories. In addition, there was some evidence that the frontally distributed component could be decomposed into two distinct components, only one of which differentiated the two classes of hit/hit ERPs. The findings suggest that at least three functionally and neurologically dissociable processes can contribute to successful recovery of source information.
受试者对视觉呈现的单词进行新旧识别判断，其中一半单词是在之前的学习阶段遇到过的。对于每个判断为旧的单词，受试者随后进行来源判断，指出他们在学习时是大声读出了这个单词（口语单词），还是听到别人对他们说出了这个单词（听觉单词）。对三类测试项目的事件相关电位（ERP）进行了比较；正确判断为新的单词（正确否定），以及被正确归为来源的口语和听觉单词（口语命中/命中和听觉命中/命中反应类别）。与之前的研究结果一致（怀尔丁，E.L.和鲁格，M.D.，《大脑》，1996年，119卷，889 - 905页），两个在时间和地形上可分离的成分，分别在顶叶和额叶出现最大值，区分了命中/命中和正确否定反应类别的ERP。此外，有一些证据表明，额叶分布的成分可以分解为两个不同的成分，其中只有一个区分了两类命中/命中ERP。研究结果表明，至少有三个在功能和神经学上可分离的过程有助于成功恢复来源信息。
