Burke D, Wenderoth P
Department of Psychology, University of Sydney, New South Wales, Australia.
Vision Res. 1993 Feb;33(3):351-9. doi: 10.1016/0042-6989(93)90091-a.
Wenderoth, Bray and Johnstone [(1988) Perception, 17, 81-91] measured motion aftereffects induced on stationary vertical sine-wave gratings by horizontally drifting two-dimensional patterns (plaids). The adapting plaid component gratings were simultaneously or alternately presented and were oriented left and right of vertical by 15, 45 or 75 degrees. It was found that aftereffects decreased linearly in the alternating conditions as the plaid component orientations changed but this was not the case in the simultaneous adaptation conditions, a finding taken to be consistent with the hypothesis that one-dimensional aftereffects have a low level site (possibly V1) whereas two-dimensional effects have a higher level site (possibly MT). In three experiments, we have examined in more detail the determinants of aftereffects induced by simultaneous and alternating plaid components. The data suggest that the mechanisms involved are more complex than those put forward by Wenderoth et al. and that plaid perception utilizes both higher and lower level processes which can be referred to, respectively, as an intersection of constraints algorithm and a moving "blob" detector.
温德罗斯、布雷和约翰斯通[（1988年）《知觉》，第17卷，第81 - 91页]测量了由水平漂移的二维图案（方格图案）在静止垂直正弦波光栅上诱发的运动后效。适应的方格图案组成光栅以垂直方向向左或向右成15度、45度或75度的方向同时或交替呈现。研究发现，在交替呈现条件下，随着方格图案组成方向的改变，后效呈线性下降，但在同时适应条件下并非如此，这一发现被认为与以下假设一致：一维后效产生于较低水平的部位（可能是V1区），而二维效应产生于较高水平的部位（可能是MT区）。在三个实验中，我们更详细地研究了由同时呈现和交替呈现的方格图案组成诱发的后效的决定因素。数据表明，所涉及的机制比温德罗斯等人提出的更为复杂，并且方格图案知觉利用了较高和较低水平的过程，这两个过程可分别称为约束算法的交叉点和移动“斑点”探测器。
