Kerzel Dirk, Zarian Leily, Souto David
Faculté de Psychologie et des Sciences de l'Education, Université de Genève, Genève, Switzerland.
J Vis. 2009 Oct 15;9(11):16.1-16. doi: 10.1167/9.11.16.
Observers reported the orientation of a tilted grating that was presented together with a vertical distractor grating. In the main experiments, target contrast was low. There was location uncertainty because target location varied randomly and differences between target and distractor were small. In contrast to a previous report (T. Liu, F. Pestilli, & M. Carrasco, 2005), our results showed that non-informative peripheral cues do not improve perceptual performance at the cued location. However, informative peripheral or central cues improved perceptual performance. When we changed the task from an unspeeded perceptual task to a speeded reaction time task, the absence of involuntary cueing effects persisted when a distractor was presented. Without distractors, involuntary cueing effects re-emerged. When target contrast was increased, involuntary cueing effects re-emerged with a distractor but were smaller than without. We suggest that more difficult perceptual tasks reduce or abolish involuntary cueing effects.
观察者报告了与垂直干扰光栅一起呈现的倾斜光栅的方向。在主要实验中，目标对比度较低。由于目标位置随机变化且目标与干扰物之间的差异较小，存在位置不确定性。与之前的一份报告（T. 刘、F. 佩斯蒂利和 M. 卡拉斯科，2005年）不同，我们的结果表明，无信息的外周线索不会提高线索位置的感知性能。然而，有信息的外周或中央线索会提高感知性能。当我们将任务从无时间限制的感知任务改为有时间限制的反应时间任务时，当呈现干扰物时，非自愿线索效应的缺失仍然存在。没有干扰物时，非自愿线索效应重新出现。当目标对比度增加时，有干扰物时非自愿线索效应重新出现，但比没有干扰物时小。我们认为，更困难的感知任务会减少或消除非自愿线索效应。
