Georgeson M A
Perception. 1980;9(5):503-22. doi: 10.1068/p090503.
Smooth tracking across an oblique grid pattern produced hallucinations of vertical and/or horizontal striations which moved with the eyes. The effect was produced by single or multiple gratings, monocularly or binocularly, but in the latter case it appeared to lie steresoscopically in the plane of fixation. Gratings containing thin lines or sawtooth edges of moderate contrast were particularly effective stimuli but sine or square waves were not. The subjective stripes had an apparent edge polarity which was opposite to that of the inducing edges or, with thin inducing lines, was determined by the lines' polarity and movement direction. Conventional explanations (eg strobe, afterimage, or moiré effects) can be ruled out. Neither the present effect nor the "pincushion-grid illusion" are due to the presence of spurious Fourier components in the stimulus pattern. An extension of a previous model, involving disinhibitory interaction between movement and pattern channels, accounts for many aspects of this elaborate phenomenon. The detailed dependence of polarity on spatial waveform and movement direction implies: (i) the spatial second harmonic is a necessary component, (ii) the generating is approximately linear and has 90 degree phase preference, and (iii) there is a movement-induced phase lag of about 45 degrees in the response to the second harmonic.
在倾斜网格图案上进行平滑追踪会产生随眼睛移动的垂直和/或水平条纹幻觉。这种效应可由单光栅或多光栅产生，单眼或双眼观察均可，但在后一种情况下，它似乎呈立体状位于注视平面内。包含细线或中等对比度锯齿边缘的光栅是特别有效的刺激物，但正弦波或方波则不然。主观条纹具有明显的边缘极性，该极性与诱导边缘的极性相反，或者对于细诱导线，由线的极性和移动方向决定。传统解释（如频闪、后像或莫尔效应）可以排除。当前的这种效应和“枕形网格错觉”都不是由于刺激图案中存在虚假的傅里叶分量。先前模型的扩展，涉及运动通道和图案通道之间的去抑制相互作用，解释了这一复杂现象的许多方面。极性对空间波形和移动方向的详细依赖性意味着：（i）空间二次谐波是必要成分，（ii）产生过程近似线性且具有90度的相位偏好，以及（iii）对二次谐波的响应中存在约45度的运动诱导相位滞后。
