WHY LUMINANCE DISCRIMINATION MAY BE BETTER THAN DETECTION
WHY LUMINANCE DISCRIMINATION MAY BE BETTER THAN DETECTION
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DOI：
10.1016/0042-6989(81)90121-8
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发表时间：
1981-01-01
期刊：
影响因子：
1.8
通讯作者：
COHN, TE
中科院分区：
文献类型：
--
作者：
LASLEY, DJ;COHN, TE
信号检测理论（SDT）预测，不确定性的存在会降低人对视觉信号的敏感性，并增加心理测量函数的指数。第一个预测已经证实了空间和色彩的不确定性。本文证实了第二个预测。心理测量函数是强度的正加速函数。这已经被两个相互竞争的理论所解释：不确定性假设和非线性传感器理论。第二个实验是为了区分这些理论。实验结果与非线性换能器理论不一致。
Signal Detection Theory (SDT) predicts that the presence of uncertainty will diminish the observer''s (human) sensitivity to visual signals and increase the exponent of the psychometric function. The 1st prediction has been confirmed previously with spatial and chromatic uncertainty. The 2nd prediction is confirmed in this paper. The psychometric function is a positive accelerating function of intensity. This has been explained by 2 competing theories: the uncertainty hypothesis and the nonlinear transducer theory. A 2nd experiment is conducted to distinguish between these theories. The results of this experiment are inconsistent with the nonlinear transducer theory.