中華心理學刊 民 82，35 卷，2 期，127-146
Chinese Journal of Psychology 1993, Vol.35, No.2, 127-146

Gary Chon-Wen Shyi（Department of Psychology, National Taiwan University）；Sean-Wen Chen（Department of Psychology, National Taiwan University）

Abstract

In three experiments we examined the relationship between the size of attentional focus and the speed of its movement by varying the size of a target stimulus and and by varying the interstimulus interval between an orienting cue and the target in a central-cuing paradigm. The result of Experiment l showed that the speed of attentional movement was unaffected by the distance it had to traverse, suggesting that attentional movement is time-invariant with respect to its traveling distance. This finding was replicated in Experiment 2; moreover, it was found that the size of attentional focus appears to affect the speed of attentional movement in that the larger the attentional focus is, the faster it would move in the visual space. These findings seem to suggest that the focus of attention was first expanded to enclose the location for a forthcoming target and was then contracted to an extent calibrated in accordance with the size of the target. Such a modified view of the zoom-lens model (Eriksen & Yeh, 1985) received some support in Experiment 3, the result of which showed that when attention was initially broadly distributed, the smaller the target was, the longer it took for attention to be properly calibrated, and vice versa. The possibility that different mechanisms may underlie central versus peripheral cuing was also discussed.

Keywords：Attentional focus, Attentional movement, Zoom-lens model