Scott Lisa S
Department of Psychology, University of Massachusetts, Amherst 01003, USA.
Perception. 2006;35(8):1107-28. doi: 10.1068/p5493.
We sought to elucidate the behavioral and electrophysiological correlates of face processing, in adults and infants, by manipulating either the featural or configural information within the face. Two different experiments are reported. In these experiments, event-related potentials (ERPs) were recorded from the scalp while adult, 8-month-old, and 4-month-old participants completed configural-change and featural-change face tasks. The infants also completed a behavioral visual paired-comparison task with featural and configural face changes. ERP results reveal hemispheric differences in processing featural but not configural changes for the N170 in adults. Furthermore, featural and configural changes are processed differently within the right and left hemispheres. The right hemisphere N170 is significantly greater for configural compared to featural changes. The left hemisphere N170, however, exhibits the opposite effect. Infant data suggest that similar to adults, 8-month-old, but not 4-month-old participants, exhibit similar hemispheric differences between featural and configural changes for the P400 component. Behavioral results suggest increased sensitivity to both featural and configural face changes in 8-month-olds compared to 4-month-olds.
我们试图通过操纵面部的特征信息或构型信息，来阐明成人和婴儿面部加工的行为及电生理相关性。本文报告了两项不同的实验。在这些实验中，当成年、8个月大和4个月大的参与者完成构型变化和特征变化的面部任务时，从头皮记录事件相关电位（ERP）。婴儿还完成了一项关于面部特征和构型变化的行为视觉配对比较任务。ERP结果显示，成人在加工特征变化而非构型变化时，N170存在半球差异。此外，特征变化和构型变化在左右半球的加工方式不同。与特征变化相比，构型变化时右半球的N170显著更大。然而，左半球的N170则呈现相反的效应。婴儿数据表明，与成人相似，8个月大的参与者在P400成分上，特征变化和构型变化之间表现出类似的半球差异，但4个月大的参与者则没有。行为结果表明，与4个月大的婴儿相比，8个月大的婴儿对特征和构型面部变化的敏感性均有所提高。
