不同时距加工机制的比较:来自ERP的证据(Ⅰ)

采用事件相关电位的方法分析了不同时距加工机制的差异。实验采用时间两分任务,要求被试形成短(400ms)和长(1600ms)的时间判断标准,然后对7个刺激系列进行短、长的判断。结果表明时间知觉过程可以诱发出一种类似于CNV的慢性负波。对于400ms的短时距加工存在显著的半球效应,右半球的波幅显著高于左半球。1600ms的时距加工没有表现出明显的半球效应。不同时距的加工存在显著的差异。1600ms比400ms加工诱发出更大的CNV波幅。

The Difference between Sub-and Supara-second Interval Processing: Evidence from an ERP Study

The aim of the research is to explore the difference of sub-and supra-second interval processing with event-related potentials used.Time bisection tasks were employed in this research.In the experiment,firstly,the subjects were asked to remember which was a short(400ms) or a long(1600ms) interval.Secondly,seven intervals between short and long intervals were presented randomly,the subjects judged which belonged to the short or the long interval.The findings showed that the contingent negative variation(CNV)was a function of interval duration.The right hemisphere predominated in temporal information processing,especially in the short interval(400ms),but not in the long interval(1600ms).The difference was significant between sub-and supra-second intervals.The amplitude of CNV evoked by a long interval is higher then it by a short interval.