对比度辨别：二次反应揭示了视觉信号均值与方差之间的关系。
Contrast discrimination: second responses reveal the relationship between the mean and variance of visual signals.
作者信息
Solomon Joshua A
机构信息
Department of Optometry and Visual Science, City University, London EC1V 0HB, UK.
出版信息
Vision Res. 2007 Dec;47(26):3247-58. doi: 10.1016/j.visres.2007.09.006. Epub 2007 Oct 24.
To explain the relationship between first- and second-response accuracies in a detection experiment, Swets, Tanner, and Birdsall [Swets, J., Tanner, W. P., Jr., & Birdsall, T. G. (1961). Decision processes in perception. Psychological Review, 68, 301-340] proposed that the variance of visual signals increased with their means. However, both a low threshold and intrinsic uncertainty produce similar relationships. I measured the relationship between first- and second-response accuracies for suprathreshold contrast discrimination, which is thought to be unaffected by sensory thresholds and intrinsic uncertainty. The results are consistent with a slowly increasing variance.
为了解释检测实验中首次反应和二次反应准确率之间的关系，斯韦茨、坦纳和伯德萨尔[斯韦茨，J.，坦纳，W. P.，Jr.，&伯德萨尔，T. G.（1961年）。知觉中的决策过程。《心理学评论》，68，301 - 340]提出视觉信号的方差随其均值增加。然而，低阈值和内在不确定性都会产生类似的关系。我测量了超阈值对比度辨别中首次反应和二次反应准确率之间的关系，超阈值对比度辨别被认为不受感觉阈值和内在不确定性的影响。结果与方差缓慢增加一致。
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