Article révisé par les pairs
Résumé : On each trial, a reference tactile stimulus and another stimulus, which was unpredictably either a sound or a light-pulse, were presented with a variable time interval. The subject had to give a fast choice reaction to the uncertain stimulus and also to judge its temporal position relative to the reference stimulus. Manipulation of the relative frequency of occurrence of the uncertain stimuli affected choice reaction time in the usual way, but produced unsystematic effects on apparent order. It is concluded that selective preparation which influences response latency does not necessarily produce a prior entry effect. © 1974, The Psychonomic Society, Inc.. All rights reserved.