不同时距加工机制的比较:来自ERP的证据(Ⅰ)

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

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 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.