Clark C D, Hogben J H
Department of Psychology, University of Western Australia, Nedlands.
Percept Psychophys. 1991 Mar;49(3):212-26. doi: 10.3758/bf03214306.
In previous studies, it has been demonstrated that visible persistence--the period for which the perceived duration of a stimulus exceeds its physical duration--can be extended by briefly incrementing the luminance of the stimulus immediately prior to offset. Using a two-component pattern integration task, we show that this effect is not an artifact of change in the total luminous flux within the stimulus. Visible persistence was unaffected by overall luminance of the stimulus. It was also time-locked to the luminance increment. Visible persistence is seen to result from a process that is initiated by stimulus onset and that can be either wholly or partially reinitiated by the onset of the luminance increment. The duration of this process (which determines the duration of stimulus visibility) can be modified in a graded fashion by stimulus events that occur after its initiation. We outline a single-process inhibitory feedback model of the persistence mechanism that accounts for the present findings.
在先前的研究中，已经证明可见后像——即刺激的感知持续时间超过其物理持续时间的时间段——可以通过在刺激消失前短暂增加其亮度来延长。使用双成分图案整合任务，我们表明这种效应不是刺激内总光通量变化的假象。可见后像不受刺激总体亮度的影响。它也与亮度增加在时间上锁定。可见后像被认为是由刺激开始引发的一个过程导致的，并且可以由亮度增加的开始完全或部分重新引发。这个过程的持续时间（它决定了刺激可见性的持续时间）可以通过在其开始后发生的刺激事件以分级方式进行修改。我们概述了一种持续机制的单过程抑制反馈模型，该模型解释了目前的发现。
