Facultad de Psicología, Campus de Somosaguas, Universidad Complutense, Madrid, Spain.
Span J Psychol. 2010 Nov;13(2):525-37. doi: 10.1017/s1138741600002225.
The role of different spatial frequency bands on face gender and expression categorization was studied in three experiments. Accuracy and reaction time were measured for unfiltered, low-pass (cut-off frequency of 1 cycle/deg) and high-pass (cutoff frequency of 3 cycles/deg) filtered faces. Filtered and unfiltered faces were equated in root-mean-squared contrast. For low-pass filtered faces reaction times were higher than unfiltered and high-pass filtered faces in both categorization tasks. In the expression task, these results were obtained with expressive faces presented in isolation (Experiment 1) and also with neutral-expressive dynamic sequences where each expressive face was preceded by a briefly presented neutral version of the same face (Experiment 2). For high-pass filtered faces different effects were observed on gender and expression categorization. While both speed and accuracy of gender categorization were reduced comparing to unfiltered faces, the efficiency of expression classification remained similar. Finally, we found no differences between expressive and non expressive faces in the effects of spatial frequency filtering on gender categorization (Experiment 3). These results show a common role of information from the high spatial frequency band in the categorization of face gender and expression.
本研究通过三个实验探讨了不同空间频带在面孔性别和表情分类中的作用。实验分别测量了未经滤波、低通（截止频率为 1 周/度）和高通（截止频率为 3 周/度）滤波面孔的准确性和反应时。滤波和未滤波面孔的均方根对比度相等。在分类任务中，低通滤波面孔的反应时均高于未滤波和高通滤波面孔。在表情任务中，这些结果是通过呈现孤立的表情面孔（实验 1）和中性-表情动态序列获得的，在这些序列中，每个表情面孔之前都呈现一个短暂呈现的同一面孔的中性版本（实验 2）。对于高通滤波面孔，在性别和表情分类中观察到不同的影响。与未滤波面孔相比，性别分类的速度和准确性都降低了，而表情分类的效率仍然相似。最后，我们发现，在空间频率滤波对面孔性别分类的影响方面，表达面孔和非表达面孔之间没有差异（实验 3）。这些结果表明，高空间频带信息在面孔性别和表情分类中起着共同的作用。
