Hand movements reveal the time-course of shape and pigmentation processing in face categorization
Hand movements reveal the time-course of shape and pigmentation processing in face categorization
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DOI：
10.3758/s13423-011-0097-6
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发表时间：
2011-08-01
影响因子：
3.5
通讯作者：
Ambady, Nalini
中科院分区：
文献类型：
--
作者：
Freeman, Jonathan B.;Ambady, Nalini
虽然形状和色素线索在人脸分类中的作用已经被详细研究，但它们处理的时间过程仍然难以捉摸。我们通过电脑鼠标测量了参与者在屏幕上男性或女性反应（性别任务）或年轻或老年反应（年龄任务）的手部运动。参与者被呈现典型的、形状非典型的或色素非典型的男性和女性面孔（性别任务）或年轻和年老的面孔（年龄任务）。在进入正确的分类之前，对非典型线索的处理导致手的轨迹偏离相反的性别或年龄类别。这些轨迹偏差的时间分析揭示了形状和色素沉着处理的解离动力学。色素沉着有一个特权，早期的作用，在性别分类，约50毫秒和前色素沉着的影响，在年龄分类100毫秒的形状前的影响。然而，在年龄分类，色素沉着有一个同时发病的影响形状。在整个性别和年龄分类过程中，它也比形状具有更大的主导影响力。结果揭示了性别和年龄分类的形状和色素加工的时间过程。
Although the roles of shape and pigmentation cues in face categorization have been studied in detail, the time-course of their processing has remained elusive. We measured participants' hand movements via the computer mouse en route to male or female responses (gender task) or young or old responses (age task) on the screen. Participants were presented with male and female faces (gender task) or with young and old faces (age task) that were typical, shape-atypical, or pigmentation-atypical. Before settling into correct categorizations, the processing of atypical cues led hand trajectories to deviate toward the opposite gender or age category. A temporal analysis of these trajectory deviations revealed dissociable dynamics in shape and pigmentation processing. Pigmentation had a privileged, early role during gender categorization, preceding shape effects by approximately 50 ms and preceding pigmentation effects in age categorization by 100 ms. In age categorization, however, pigmentation had a simultaneous onset of influence as shape. It also had a more dominant influence than shape throughout the gender and age categorization process. The results reveal the time-course of shape and pigmentation processing in gender and age categorization.