Angeli Adriana, Davidoff Jules, Valentine Tim
Goldsmiths, University of London, London, UK.
Q J Exp Psychol (Hove). 2008 May;61(5):690-707. doi: 10.1080/17470210701399305. Epub 2007 Jul 30.
Four experiments with faces support the original interpretation of categorical perception (CP) as only present for familiar categories. Unlike in the results of Levin and Beale (2000), no evidence is found for face identity CP with unfamiliar faces. Novel face identities were shown to be capable of encoding for immediate sorting purposes but the representations utilized do not have the format of perceptual categories. One possibility explored was that a choice of a distinctive face as an end-point in a morphed continuum can spuriously produce effects that resemble CP. Such morphed continua provided unequal psychological responses to equal physical steps though much more so in a better likeness paradigm than for forced-choice recognition. Thus, researchers doing almost the same experiments may produce very different results and come to radically different conclusions.
四项关于面孔的实验支持了对面孔分类知觉（CP）的原始解释，即CP仅存在于熟悉的类别中。与莱文和比尔（2000年）的研究结果不同，未发现针对不熟悉面孔的面孔身份CP证据。新的面孔身份被证明能够为即时分类目的进行编码，但所使用的表征并不具有知觉类别的形式。所探讨的一种可能性是，在变形连续体中选择一张独特的面孔作为端点可能会虚假地产生类似于CP的效应。尽管在更好的相似度范式中比在强制选择识别中这种效应更明显，但这种变形连续体对相等的物理步长产生了不相等的心理反应。因此，进行几乎相同实验的研究人员可能会产生非常不同的结果，并得出截然不同的结论。
