Nakajima Y, Kawamura S
Graduate School of Human Sciences, Osaka University, Japan.
Percept Mot Skills. 1998 Apr;86(2):691-7. doi: 10.2466/pms.1998.86.2.691.
The present study investigated the redundancy gain in discrimination of colored lights. Subjects were requested to discriminate a target from 34 nontarget lights differing from the target in luminance, hue, or both, and RTs were recorded. Experimental variables were the complexity of stimulus pattern and the eccentricity of the target in visual angle. The 35 lights were arranged regularly on an imaginary grid in the low-complexity condition and were arranged randomly in the high-complexity condition. The eccentricity of target was varied from 0 degree to 16 degrees. Only when the stimulus pattern was highly complex and eccentricity was large, the combination of luminance and hue made the subject's discrimination faster than when luminance or hue individually operated as a cue for discrimination. That is, a redundant target effect was found only for a highly complex stimulus pattern and in peripheral vision.
本研究调查了在辨别彩色光时的冗余增益。要求受试者从34个非目标光中辨别出一个目标光，这些非目标光在亮度、色调或两者上与目标光不同，并记录反应时间。实验变量是刺激模式的复杂性和目标在视角上的偏心度。在低复杂性条件下，35个光规则地排列在一个假想的网格上，在高复杂性条件下则随机排列。目标的偏心度从0度变化到16度。只有当刺激模式高度复杂且偏心度较大时，亮度和色调的组合才会使受试者的辨别速度比亮度或色调单独作为辨别线索时更快。也就是说，仅在高度复杂的刺激模式和周边视觉中发现了冗余目标效应。
