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自上而下的控制在注意瞬脱中并未丧失:来自完整内源性线索化的证据。

Top-down control is not lost in the attentional blink: evidence from intact endogenous cueing.

作者信息

Zhang Dexuan, Shao Liping, Nieuwenstein Mark, Zhou Xiaolin

机构信息

Department of Psychology, Peking University, Beijing 100871, China.

出版信息

Exp Brain Res. 2008 Feb;185(2):287-95. doi: 10.1007/s00221-007-1153-3. Epub 2007 Oct 10.

Abstract

The attentional blink (AB) refers to the finding that performance on the second of two targets (T1 and T2) is impaired when the targets are presented at a target onset asynchrony (TOA) of less than 500 ms. One account of the AB assumes that the processing load of T1 leads to a loss of top-down control over stimulus selection. The present study tested this account by examining whether an endogenous spatial cue that indicates the location of a following T2 can facilitate T2 report even when the cue and T2 occur within the time window of the AB. Results from three experiments showed that endogenous cuing had a significant effect on T2 report, both during and outside of the AB; this cuing effect was modulated by both the cue-target onset asynchrony and by cue validity, while it was invariant to the AB. These results suggest that top-down control over target selection is not lost during the AB.

摘要

注意瞬脱(AB)指的是这样一个发现:当两个目标(T1和T2)以小于500毫秒的目标呈现间隔(TOA)呈现时,对第二个目标的表现会受到损害。对注意瞬脱的一种解释是,T1的加工负荷导致对刺激选择的自上而下控制丧失。本研究通过考察即使线索和T2出现在注意瞬脱的时间窗口内,指示后续T2位置的内源性空间线索是否能促进T2报告,来检验这一解释。三个实验的结果表明,内源性线索对T2报告有显著影响,无论是在注意瞬脱期间还是之外;这种线索效应受线索-目标呈现间隔和线索有效性的调节,而不受注意瞬脱的影响。这些结果表明,在注意瞬脱期间,对目标选择的自上而下控制并没有丧失。

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