Herrmann D J, van Dyke K A
Cortex. 1978 Dec;14(4):521-9. doi: 10.1016/s0010-9452(78)80027-6.
The present experiment investigated the effect of hemispheric dominance, as indicated by handedness, and perceptual processing. Displays containing two visual patterns were presented to right- and left-handed subjects who classified the two patterns as being the same or different. Also the two patterns in a display were in either an identical orientation or nonidentical orientations. Overall, left handers were faster than right handers at the "same-different" judgement. Additionally, latency increased with the angular discrepancy in orientation between patterns for both handedness groups but this increase was smaller for left handers than for right handers. Apparently, left handers evaluate overall perceptual similarity faster than right handers and they also mentally rotate perceived patterns of discrepant orientations faster than right handers. These findings contradict previous generalizations that left handers are deficient perceptually. Moreover, the present results support the position that left handers should be faster at global perceptual tasks because left handers have less neural distance than right handers mediating the transmission of information between the locus of perception and the locus of dominance.
本实验研究了用利手表示的半球优势以及知觉加工的影响。向右利手和左利手的受试者呈现包含两种视觉图案的展示，让他们将这两种图案分类为相同或不同。此外，展示中的两种图案要么方向相同，要么方向不同。总体而言，在“相同-不同”判断上，左利手比右利手速度更快。此外，对于两个利手组，反应潜伏期都随着图案方向之间的角度差异而增加，但左利手的这种增加比右利手小。显然，左利手比右利手能更快地评估整体知觉相似性，并且他们在心理上旋转方向不同的知觉图案的速度也比右利手快。这些发现与之前关于左利手在知觉方面存在缺陷的普遍观点相矛盾。此外，目前的结果支持这样一种观点，即左利手在全局知觉任务上应该更快，因为与右利手相比，左利手在介导知觉位点和优势位点之间信息传递的神经距离更小。
