Smith R A, Swift D J
J Opt Soc Am A. 1985 Sep;2(9):1593-9. doi: 10.1364/josaa.2.001593.
We measured the masking of a spatial 4-cycle/deg sinusoid in the presence of both random and sinusoidal masks. Subjects used a variety of detection strategies, depending on psychophysical technique and familiarity with the mask. Some strategies produce Weber's-law behavior and appear formally equivalent to identification tasks; we hypothesize that these exemplify the operation of Birdsall's theorem. Other strategies produce power-law behavior and are more like the simpler detection task. Our results suggest that criterion change (commonly uncontrolled in masking studies) can produce an unacceptably large bias in the results.
我们测量了在存在随机掩蔽和正弦掩蔽的情况下，空间频率为4周/度的正弦波的掩蔽效应。根据心理物理学技术和对掩蔽的熟悉程度，受试者使用了多种检测策略。一些策略产生韦伯定律行为，并且在形式上等同于识别任务；我们假设这些体现了伯德索尔定理的作用。其他策略产生幂律行为，更类似于较简单的检测任务。我们的结果表明，标准变化（在掩蔽研究中通常未得到控制）会在结果中产生不可接受的大偏差。
