Proctor Robert W, Vu Kim-Phuong L, Nicoletti Ryan
Department of Psychological Sciences, Purdue University, West Lafayette, Indiana 47907-2004, USA.
Percept Psychophys. 2003 Nov;65(8):1318-29. doi: 10.3758/bf03194855.
In four experiments, we investigated whether a right-left prevalence effect occurs for the Simon task, in which stimulus location is irrelevant, when the stimulus and the response sets vary along horizontal and vertical dimensions simultaneously. Simon effects were evident for both dimensions, and they were of similar magnitude, indicating no prevalence effect. Manipulations of the relative salience of the dimensions for the stimulus and the response sets resulted in a larger Simon effect for the more salient dimension than for the less salient one, but there was no overall prevalence effect. The results indicate that manipulations of salience affect the relative magnitudes of automatic response activation for the vertical and the horizontal dimensions but that the right-left prevalence effect is due to a coding bias in intentional response selection processes when stimulus location is relevant.
在四项实验中，我们研究了在刺激位置无关的西蒙任务中，当刺激和反应集同时沿水平和垂直维度变化时，是否会出现左右优势效应。两个维度的西蒙效应均很明显，且大小相似，表明不存在优势效应。对刺激和反应集维度的相对显著性进行操纵后，较显著维度的西蒙效应大于较不显著维度，但总体上不存在优势效应。结果表明，显著性操纵会影响垂直和水平维度自动反应激活的相对大小，但左右优势效应是由于在刺激位置相关时，有意反应选择过程中的编码偏差所致。
