中華心理學刊 民 81，34 卷，57-74
Chinese Journal of Psychology 1992, Vol.34, 57-74

Gary Chon-Wen Shyi（National Chung-Cheng University）；Mary A. Peterson（University of Arizona）

Abstract

Observers judged both the possibility and amoun of depicted depth in briefly exposed possible and impossible figures of three sizes-large, medium, and small. Observers viewed these figures in one of two presentation conditions (either intermixed or blocked by size) that were designed to manipulate the width of attentional focus. Two types of impossible figures were used, one in which the top and bottom corner were depicted from inconsistent viewpoints, another in which only one of the four corners was inconsistent with the other three. The retinal locus of the inconsistent corners was varied. Three major findings were obtained. First, estimated depth and apparent possibility were not completely overlapping variables; hence, theories must be specific about the perceived variables which they intend to predict. Second, the extraction of structural details signaling both possibility and depth was disrupted for small figures when the attentional focus was tailored for larger figures. Thus, object perception can be affected by the amount of processing resources within the attentional focus. Third, object-wide information was not utilized for either type of judgment. Implications for global and local theories of perceptual organization are discussed.