Burton L A, Levy J
Bruke Rehabilitation Center, Cornell University Medical College, Beverly Hills, CA 90212.
Brain Cogn. 1991 Jan;15(1):95-105. doi: 10.1016/0278-2626(91)90018-4.
A free-vision chimeric facial emotion judgment task and a tachistoscopic face-recognition reaction time task were administered to 20 male right-handed subjects. The tachistoscopic task involved judgments of whether a poser in the centrally presented full-face photograph was the same or different poser than in a profile photograph presented in the left or right visual field (LVF, RVF). The free-vision task was that used by J. Levy, W. Heller, M. Banich, and L. Burton (1983, Brain and Cognition, 2, 404-419) and involved judging which of two chimeric faces appeared happier, in which the two chimeras were mirror images of each other and each chimera consisted of a smiling half-face joined at the midline to a neutral half-face of the same poser. For the tachistoscopic task, subjects were divided into groups of Fast and Slow responders by a median split of the mean reaction times. For the Fast subjects, judgments were faster in the LVF than in the RVF, and there was a significant interaction between visual field and profile direction, such that responses were faster for medially oriented profiles; i.e., LVF responses were faster for right-facing than for left-facing profiles, with the reverse relationship in the RVF. The Slow responders did not show these effects. Only the Fast group showed the bias for choosing the chimera with the smile on the left as happier, and mean response speed and the LVF advantage on the tachistoscopic test correlated with the leftward bias on the free-vision task for all subjects combined. It was suggested that overall response speed on the face-matching task reflected the extent to which specialized and more efficient right hemisphere functions were activated.
对20名右利手男性受试者进行了自由视觉嵌合面部情绪判断任务和速示器面部识别反应时间任务。速示器任务涉及判断中央呈现的全脸照片中的人物与左或右视野（LVF，右视野）中呈现的侧面照片中的人物是否相同。自由视觉任务采用了J.利维、W.赫勒、M.巴尼奇和L.伯顿（1983年，《大脑与认知》，2，404 - 419）使用的任务，即判断两个嵌合面部中哪一个看起来更快乐，其中两个嵌合体是彼此的镜像，每个嵌合体由一个微笑的半脸在中线处与同一人物的中性半脸相连组成。对于速示器任务，根据平均反应时间的中位数分割将受试者分为快速反应组和慢速反应组。对于快速反应组的受试者，左视野中的判断比右视野更快，并且视野和侧面方向之间存在显著的交互作用，即对于向内侧定向的侧面，反应更快；也就是说，左视野中向右的侧面比向左的侧面反应更快，右视野中则相反。慢速反应组没有表现出这些效应。只有快速反应组表现出选择左侧有微笑的嵌合体更快乐的偏向，并且在速示器测试中平均反应速度和左视野优势与所有受试者在自由视觉任务中的向左偏向相关。研究表明，面部匹配任务的总体反应速度反映了专门化且更高效的右半球功能被激活的程度。
