Locus of the effect of temporal preparation:: Evidence from the lateralized readiness potential

被引:126
作者
Müller-Gethmann, H [1 ]
Ulrich, R [1 ]
Rinkenauer, G [1 ]
机构
[1] Univ Tubingen, Inst Psychol, Abt Allgemeine Psychol & Methodenlehre, D-72072 Tubingen, Germany
关键词
temporal preparation; reaction time; lateralized readiness potential; foreperiod effects; P300; CNV;
D O I
10.1111/1469-8986.00061
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
It is well established that reaction time (RT) is shorter when a response signal is preceded by a warning signal, because the warning signal causes the participant to prepare for the upcoming response. A review of chronometric and psychophysiological studies reveals the prevailing view that this temporal preparation operates mainly at a motor level speeding up rather late processes. To assess the locus of this preparation effect, we conducted two experiments employing the lateralized readiness potential ('RP). Contrary to this prevailing view, the results of both experiments clearly indicate that temporal preparation enhances the processing speed of relatively early processes, because a manipulation of temporal uncertainty affected RT, the P300 latency, and the stimulus-to-LRP interval but not the LRP-to-keypress interval.
引用
收藏
页码:597 / 611
页数:15
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