Categorical perception of morphed facial expressions
Categorical perception of morphed facial expressions
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DOI：
10.1080/713756735
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发表时间：
1996-06-01
期刊：
影响因子：
2
通讯作者：
Rowland, D
中科院分区：
文献类型：
--
作者：
Calder, AJ;Young, AW;Rowland, D
利用计算机生成的线条图，Etcoff和Magee（1992）发现了对面部表情的分类感知的证据。我们报告了四个实验，用照片级的刺激重复和扩展了Etcoff和Magee的发现。实验1和实验2测量了个体刺激沿着特定的表达连续体（如从快乐到悲伤）的识别，并通过刺激A、B和X顺序呈现的ABX任务来识别这些刺激；我们的识别数据显示，每个表情连续体被认为是由类别边界分开的两个不同的部分。从这些识别数据中，我们可以预测被试在ABX辨别任务中的表现，并证明跨界辨认比类别内辨认更好；也就是说，被识别为不同表情的两张脸（如快乐和悲伤）比被识别为相同表情的两张身体差异相等的脸（如快乐）更容易区分。
Using computer-generated line-drawings, Etcoff and Magee (1992) found evidence of categorical perception of facial expressions. We report four experiments that replicated and extended Etcoff and Magee's findings with photographic-quality stimuli. Experiments 1 and 2 measured identification of the individual stimuli falling along particular expression continua (e.g. from happiness to sadness) and discrimination of these stimuli with an ABX task in which stimuli A, B, and X were presented sequentially; subjects had to decide whether X was the same as A or B. Our identification data showed that each expression continuum was perceived as two distinct sections separated by a category boundary. From these identification data we were able to predict subjects' performance in the ABX discrimination task and to demonstrate better discrimination of cross-boundary than within-category pairs; that is, two faces identified as different expressions (e.g. happy and sad) were easier to discriminate than two faces of equal physical difference identified as the same expression (e.g. both happy).