Response-repetition effects in task switching-Dissociating effects of anatomical and spatial response discriminability
Response-repetition effects in task switching-Dissociating effects of anatomical and spatial response discriminability
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DOI：
10.1016/j.actpsy.2011.01.006
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发表时间：
2011-03-01
影响因子：
1.8
通讯作者：
Proctor, Robert W.
中科院分区：
文献类型：
--
作者：
Koch, Iring;Schuch, Stefanie;Proctor, Robert W.
在任务切换中，响应重复通常会导致任务重复的性能优势，但任务切换的成本。我们研究了这种成本效益模式是否受反应辨别力（RD）的影响，改变（a）解剖反应分离（手内与手间反应）和（B）空间分离（近与远反应键）。我们假设，解剖RD增加响应竞争一般，而空间RD增加左，右编码的显着性，从而促进响应选择。在两个实验中，我们发现，空间RD增加了任务切换的响应重复成本，但同样减少了任务重复的响应重复效益。空间RD的效果是反应特异性的，但不与任务切换。这个数据模式是一致的，最近的帐户，提出了促进响应选择增加响应执行后的响应“自我抑制”。与此相反，解剖RD的影响主要包括在所有条件下的反应时间水平的整体增加，而错误率下降，这表明反应标准的一般转变。两者合计，数据表明，在运动反应代码水平上的自我抑制机制有助于在任务切换中的反应重复效应，这可能是独立的任务特定的机制，加强协会。(C)2011 Elsevier B.V.保留所有权利。
In task switching, response repetitions typically lead to performance benefits for task repetitions but costs for task switches. We examined whether this cost-benefit pattern is affected by response discriminability (RD), varying (a) the anatomical response separation (within-hand vs. between-hand responses) and (b) the spatial separation (close vs. far response keys). We assumed that anatomical RD increases response competition generally, whereas spatial RD increases the salience of left-right coding and thus facilitates response selection. In two experiments, we found that spatial RD increased the response-repetition costs in task switches but similarly decreased the response-repetition benefit in task repetitions. The effect of spatial RD was response-specific but did not interact with task switching. This data pattern is consistent with a recent account that proposed that facilitated response selection increases response "self-inhibition" after response execution. In contrast, the influence of anatomical RD primarily consisted of an overall increase of reaction-time level in all conditions, whereas error rates decreased, suggesting a general shift in response criterion. Taken together, the data suggest that a self-inhibition mechanism on the level of motor response codes contributes to response-repetition effects in task switching, which is possibly independent of task-specific mechanisms of strengthening of associations. (C) 2011 Elsevier B.V. All rights reserved.