Corina D P
University of California, San Diego.
Brain Cogn. 1989 Mar;9(2):227-37. doi: 10.1016/0278-2626(89)90032-8.
This study explores the use of two types of facial expressions, linguistic and affective, in a lateralized recognition accuracy test with hearing and deaf subjects. The linguistic expressions represent unfamiliar facial expression for the hearing subjects whereas they serve as meaningful linguistic emblems for deaf signers. Hearing subjects showed left visual field advantages for both types of signals while deaf subjects' visual field asymmetries were greatly influenced by the order of presentation. The results suggest that for hearing persons, the right hemisphere may predominate in the recognition of all forms of facial expression. For deaf signers, hemispheric specialization for the processing of facial signals may be influenced by the differences these signals serve in this population. The use of noncanonical facial signals in laterality paradigms is encouraged as it provides an additional avenue of exploration into the underlying determinants of hemispheric specialization for recognition of facial expression.
本研究在听力正常和失聪受试者的侧向识别准确性测试中，探究了语言性和情感性两种面部表情的使用情况。对于听力正常的受试者而言，语言性表情代表着不熟悉的面部表情，而对于失聪手语使用者来说，它们则是有意义的语言符号。听力正常的受试者在两种信号类型上均表现出左视野优势，而失聪受试者的视野不对称性则受呈现顺序的影响很大。结果表明，对于听力正常的人来说，右半球在识别所有形式的面部表情方面可能占主导地位。对于失聪手语使用者，处理面部信号的半球特化可能会受到这些信号在该群体中所起作用差异的影响。鼓励在侧向性范式中使用非典型面部信号，因为它为探究面部表情识别中半球特化的潜在决定因素提供了一条额外的探索途径。
