Mayer M J
Vision Res. 1983;23(5):547-50. doi: 10.1016/0042-6989(83)90130-x.
Adults who were initially less sensitive to a diagonal, 10 c/deg sinusoidal grating, practiced detecting it for 3000 yes-no signal detection trials. Following practice all observers had improved their relative sensitivity to the diagonal and most were as sensitive to the diagonal as to cardinal (horizontal or vertical) orientations. Practicing a cardinal axis, on the other hand, caused no improvement in sensitivity unless the pre-practice threshold for that orientation was elevated with respect to other orientations. Three hypotheses are proposed to account for the improved sensitivity. The results are also related to the typical pattern of adult anisotropic contrast sensitivity which favors the cardinal orientations.
最初对10周/度的对角正弦光栅不太敏感的成年人，通过3000次是/否信号检测试验练习检测该光栅。练习之后，所有观察者对对角线的相对敏感度都有所提高，并且大多数人对对角线的敏感度与对主要（水平或垂直）方向的敏感度相同。另一方面，练习主要轴并不会提高敏感度，除非该方向的练习前阈值相对于其他方向有所提高。提出了三种假说来解释敏感度的提高。研究结果也与成人各向异性对比敏感度的典型模式相关，该模式有利于主要方向。
