Dukewich Kristie R, Boehnke Susan E
Department of Psychology, Dalhousie University, Life Sciences Centre, Halifax, Nova Scotia, Canada B3H 4J1.
Neurosci Lett. 2008 Dec 31;448(3):231-5. doi: 10.1016/j.neulet.2008.10.063. Epub 2008 Nov 1.
Inhibition of return (IOR) refers to slowed responses to targets presented at the same location as a preceding stimulus. We explored whether the IOR effect would increase with the number of cues preceding the target (a 'cue'). Subjects performed a Posner cueing task with 1-5 cue presentations prior to the target, to which they made either a manual localization (Experiment 1) or target discrimination response (Experiment 2). The cues could be the same as (Experiment 1), or differ in shape from (Experiment 2), the target. The results showed that regardless of cue-target congruency the IOR effect increased dramatically with the number of preceding cues. This increase was driven mostly by a linear slowing of reaction times to targets presented on the same side as the cue(s), suggesting that a process such as sensory adaptation and/or habituation may be a contributing mechanism to the IOR effect.
返回抑制（IOR）是指对出现在与先前刺激相同位置的目标的反应变慢。我们探究了IOR效应是否会随着目标之前的线索数量（“线索”）的增加而增强。受试者在目标出现之前进行了1至5次线索呈现的波斯纳线索任务，他们对目标做出手动定位反应（实验1）或目标辨别反应（实验2）。线索可以与目标相同（实验1），或者在形状上与目标不同（实验2）。结果表明，无论线索与目标是否一致，IOR效应都随着先前线索的数量急剧增加。这种增加主要是由对与线索同侧呈现的目标的反应时间的线性减慢所驱动的，这表明诸如感觉适应和/或习惯化等过程可能是IOR效应的一个促成机制。
