准备状态对反应抑制的影响

从事件因素和时间因素两个方面探讨了准备状态对反应抑制的影响。事件准备可降低反应模式的不确定性 ,而时间准备则与降低反应时间的不确定性有关。线索、反应概率以及刺激呈现时间等因素不仅导致反应时间出现变化 ,还可引起反应力、心跳间期以及LRP和CNV等脑电指标发生变化。传统的反应抑制研究以反应时为指标 ,不能揭示反应抑制的内部过程 ,而心理生理学方法能弥补这一缺陷。生理指标与行为指标的结合 ,以及生理指标之间的结合 ,可更有效地探讨准备状态对反应抑制的效应。

Effects of Preparatory on Response Inhibition

The effects of preparation on response inhibition were discussed based on two types of action preparation,namely event and temporal preparation.Event preparation reduced the degree of uncertainty of response patterns,and temporal preparation came into play if it was uncertain when to execute the action.Reaction time,reaction force,interbeat interval,LRP and CVN varied with the changes of precues,response probability and time when to execute the action.The underlying mechanism could not be examined directly by behavioral indices,but modern psychophysiological techniques could bridge this gap.The combination of psychophysiological techniques and behavioral indices would be useful to explore the effects of preparation on response inhibition.