Miles James D, Proctor Robert W
Department of Psychological Sciences, Purdue University, 703 Third St., W. Lafayette, IN 47907-2081, United States.
Acta Psychol (Amst). 2009 Jan;130(1):95-102. doi: 10.1016/j.actpsy.2008.10.005. Epub 2008 Nov 28.
In two experiments, we compared level of activation and temporal overlap accounts of compatibility effects in the Simon task by reducing the discriminability of spatial and non-spatial features of a target location word. Participants made keypress responses to the non-spatial or spatial feature of centrally presented location words. The discriminability of the spatial feature of the word (Experiment 1), or of both the spatial and non-spatial feature (Experiment 2), was manipulated. When the spatial feature of the word was task-irrelevant, lowering the discriminability of this feature reduced the compatibility effect. The compatibility effect was restored when the discriminability of both the task-relevant and task-irrelevant features were reduced together. Results provide further evidence for the temporal overlap account of compatibility effects. Furthermore, compatibility effects when the spatial information was task-relevant and those when the spatial information was task-irrelevant were moderately correlated with each other, suggesting a common underlying mechanism in both versions.
在两项实验中,我们通过降低目标位置词的空间和非空间特征的可辨别性,比较了西蒙任务中兼容性效应的激活水平和时间重叠解释。参与者对中央呈现的位置词的非空间或空间特征做出按键反应。我们操纵了单词空间特征的可辨别性(实验1),或空间和非空间特征两者的可辨别性(实验2)。当单词的空间特征与任务无关时,降低该特征的可辨别性会降低兼容性效应。当任务相关和任务无关特征的可辨别性同时降低时,兼容性效应得以恢复。结果为兼容性效应的时间重叠解释提供了进一步的证据。此外,当空间信息与任务相关时的兼容性效应和空间信息与任务无关时的兼容性效应之间存在适度的相关性,这表明两个版本中存在共同的潜在机制。