Nicholls M E, Bradshaw J L, Mattingley J B
Department of Psychology, University of Melbourne, Parkville, Vic., Australia.
Neuropsychologia. 1999 Mar;37(3):307-14. doi: 10.1016/s0028-3932(98)00074-8.
Perceptual asymmetries under free-viewing conditions were investigated in 24 normal dextral adults. Three tasks were administered that required participants to chose between a pair of left/right reversed stimuli on the basis of their brightness, numerosity or size. These stimulus features were represented asymmetrically within the stimuli, so that each stimulus appeared darker, larger or more numerous on the left or right sides. Participants more often selected the stimulus with the relevant feature on the left-hand side for all three tasks. Response times for leftward responses were faster than rightward responses. Split-half reliabilities revealed a high level of consistency within the tasks. However, the correlation between tasks was low. These results suggest that the different tasks, while showing similar levels of perceptual asymmetry, engage distinct sets of lateralised processes.
在24名正常右利手成年人中研究了自由观看条件下的知觉不对称性。进行了三项任务，要求参与者根据亮度、数量或大小在一对左右颠倒的刺激物之间进行选择。这些刺激特征在刺激物中不对称呈现，以便每个刺激物在左侧或右侧看起来更暗、更大或更多。在所有三项任务中，参与者更常选择左手边具有相关特征的刺激物。向左反应的反应时间比向右反应更快。分半信度显示任务内部具有高度一致性。然而，任务之间的相关性较低。这些结果表明，不同的任务虽然表现出相似程度的知觉不对称性，但涉及不同的偏侧化过程。
