ABSTRACT In previous studies we have shown that a group of individuals with developmental prosopagnosia (DP): (i) were impaired at recognizing objects when presented as silhouettes or fragmented forms; stimuli which place particular demands on global shape processing, (ii) that these impairments correlated with their face recognition deficit, (iii) that they showed a reduced global precedence effect in Navon’s paradigm, and (iv) that the magnitude of their global precedence effect correlated with their face and object recognition performance. This pattern of deficits points towards a delay in the processing of global shape information; a delay that may weaken top-down influences on recognition performance. Here we show that the DPs show reduced real object superiority effects (faster responses to real objects than nonobjects) compared with controls. Given that real object superiority effects reflect top-down processing, these findings support the notion of impaired global shape based top-down processing in DP.

中文翻译：

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整体形状信息的延迟处理与发育性面容失认症中较弱的自上而下效应相关

摘要 在之前的研究中，我们已经表明一组患有发育性面容失认症 (DP) 的个体：(i) 当以轮廓或碎片形式呈现时，识别物体的能力受损；对全局形状处理提出特殊要求的刺激，（ii）这些损伤与他们的面部识别缺陷相关，（iii）他们在 Navon 范式中表现出降低的全局优先效应，以及（iv）他们的全局优先效应的大小与他们的面部和物体识别性能相关。这种缺陷模式表明全局形状信息的处理延迟；可能会削弱自上而下对识别性能影响的延迟。在这里，我们表明与对照相比，DP 显示出减少的真实对象优势效应（对真实对象的响应比非对象更快）。鉴于真实物体优势效应反映了自上而下的处理，这些发现支持 DP 中基于全局形状受损的自上而下处理的概念。