Dissociation of perceptual and motor inhibition processes through the use of novel computerized conflict tasks
Dissociation of perceptual and motor inhibition processes through the use of novel computerized conflict tasks
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DOI：
10.1017/s1355617703910034
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发表时间：
2003-01-01
影响因子：
2.6
通讯作者：
Halperin, JM
中科院分区：
文献类型：
--
作者：
Nassauer, KW;Halperin, JM
有效的行为功能需要早期对不相关刺激的知觉抑制和后期对不适当反应的运动抑制。知觉和运动冲突任务的开发是为了区分评估知觉和运动抑制，并确定这些过程是否使用单独或共享的认知资源。计算机化的任务包括六个子测试，涉及出现在不同位置的框或箭头。受试者通过按键盘左边或右边的一个键来回应。在不同的子测试中，箭头方向或刺激位置决定了正确的反应。知觉抑制评估要求受试者对一个相互冲突的箭头方向作出反应，而忽略刺激的位置。运动抑制评估涉及受试者在与中心位置箭头指示的方向相反的方向上作出反应。在一个神经正常的样本（N = 44）中，反应时间分析得出了显著的知觉和运动冲突主要效应，在冲突条件下表现较慢，但没有显著的知觉和运动相互作用。根据加性因素模型，缺乏显著的知觉X运动相互作用表明这两个过程利用不同的认知资源。然而，在两个冲突任务上的表现彼此显著相关，知觉冲突表现与Stroop干扰显著相关。
Efficient behavioral functioning requires early perceptual inhibition of irrelevant stimuli and later motor inhibition of inappropriate responses. The Perceptual and Motor Conflict Tasks were developed to differentially assess perceptual and motor inhibition, and to determine whether these processes utilize separate or shared cognitive resources. The computerized tasks include six subtests involving a box or an arrow appearing in various locations. Subjects respond by pressing a key on the left or right side of a keyboard. In different subtests, arrow direction or stimulus location determines correct responses. Perceptual inhibition assessment requires the subject to respond to a conflicting arrow direction while ignoring stimulus location. Motor inhibition assessment involves the subject responding in the direction opposite to that indicated by a centrally located arrow. In a neurologically normal sample (N = 44), reaction time analyses yielded significant Perceptual and Motor Conflict main effects, with slower performance under conflict conditions, but no significant Perceptual X Motor interaction. The lack of a significant Perceptual X Motor interaction, according to the additive factor model, indicates that these two processes utilize distinct cognitive resources. Nevertheless, performance on the two conflict tasks was significantly correlated with each other, and Perceptual Conflict performance was significantly correlated with Stroop interference.