Luh K E, Rueckert L M, Levy J
Department of Psychology, University of Chicago, IL 60637.
Brain Cogn. 1991 May;16(1):83-103. doi: 10.1016/0278-2626(91)90087-o.
We examined perceptual biases of right-handers on six free-vision chimeric tasks; two involving a judgement of happiness of a facial expression in photographic and cartoon chimeras, two involving a judgement of femininity in male/female photographic and cartoon chimeras, and two involving a spatial judgement of nonface chimeric stimuli. All four of the face tasks and one of the nonface tasks elicited left spatial field biases of varying magnitudes, and perceptual asymmetries on all tasks were positively correlated. However, multiple correlational analyses revealed that these tests shared differing proportions of variance with each other. Results indicate that, in addition to a common factor or set of factors contributing to lateral biases that is independent of both the nature of the stimulus and whether the stimulus engages lateralized mechanisms, there are distinct lateralized mechanisms which yield different patterns of perceptual asymmetries for different stimuli.
我们在六项自由视觉嵌合任务中研究了右利手者的知觉偏向；其中两项任务涉及对照片和卡通嵌合体中面部表情的愉悦度判断，两项任务涉及对男性/女性照片和卡通嵌合体中女性气质的判断，还有两项任务涉及对非面部嵌合刺激的空间判断。所有四项面部任务和一项非面部任务都引发了不同程度的左空间视野偏向，并且所有任务中的知觉不对称性呈正相关。然而，多重相关分析表明，这些测试彼此之间共享不同比例的方差。结果表明，除了存在一个与刺激性质和刺激是否涉及偏侧化机制均无关的、导致偏侧偏向的共同因素或一组因素外，还存在不同的偏侧化机制，这些机制会针对不同刺激产生不同模式的知觉不对称。
