Casco C, Prunetti E
Department of General Psychology, University of Padova, Italy.
Percept Mot Skills. 1996 Jun;82(3 Pt 2):1155-67. doi: 10.2466/pms.1996.82.3c.1155.
This study examined differences between normal and poor readers in the visual-search strategy used to detect a target shape in a background of similar shapes. No differences between the two groups occur in search for simple features (Exps. 1 and 3) and conjunction of features (Exp. 2). However, the performance of the two groups differ on search tasks with multifeatured shapes, in which targets and nontargets differ in both the identity of features and their spatial relationship or in the spatial relationship of features alone. Results suggest that, rather than a problem in searching complex stimuli, poor searchers have difficulty within stimuli like letters and geometrical shapes which require integration of features within a module of the visual system.
本研究考察了正常阅读者和阅读能力较差者在相似形状背景中检测目标形状时所采用的视觉搜索策略的差异。在搜索简单特征（实验1和3）以及特征联结（实验2）方面，两组之间没有差异。然而，在具有多特征形状的搜索任务中，两组的表现有所不同，在这类任务中，目标和非目标在特征的一致性及其空间关系上存在差异，或者仅在特征的空间关系上存在差异。结果表明，阅读能力较差者并非在搜索复杂刺激方面存在问题，而是在诸如字母和几何形状等需要在视觉系统的一个模块内整合特征的刺激方面存在困难。
