McCarley Jason S, Kramer Arthur F, DiGirolamo Gregory J
Department of Psychology, Mississippi State University, Mississippi State, MS, USA.
J Vis. 2003 Dec 4;3(11):751-60. doi: 10.1167/3.11.9.
Research has produced conflicting evidence as to whether saccade programming is or is not biased by perceptual illusions. However, previous studies have generally not distinguished between effects of illusory percepts on reflexive saccades, programmed automatically in response to an external visual signal, and voluntary saccades, programmed purposively to a location where no signal has occurred. Here we find that voluntary and reflexive saccades are differentially susceptible to the Müller-Lyer illusion; reflexive movements are reliably but modestly affected by the illusion, whereas voluntary movements show an effect similar to that of perceptual judgments. Results suggest that voluntary saccade programming occurs within a non-retinotopic spatial representation similar to that of visual consciousness, whereas reflexive saccade programming occurs within a representation integrating retinotopic and higher level spatial frames. The effects of the illusion on reflexive saccades are not subject to endogenous control, nor are they modulated by the strength of an exogenous target signal.
关于扫视编程是否受知觉错觉影响，研究得出了相互矛盾的证据。然而，先前的研究通常没有区分错觉知觉对反射性扫视（即自动响应外部视觉信号而编程的扫视）和随意性扫视（即有目的地编程到没有信号出现的位置的扫视）的影响。在这里，我们发现随意性扫视和反射性扫视对错觉的敏感度不同；反射性运动确实会受到错觉的影响，但程度适中，而随意性运动显示出与知觉判断相似的效果。结果表明，随意性扫视编程发生在类似于视觉意识的非视网膜拓扑空间表征中，而反射性扫视编程发生在整合视网膜拓扑和更高层次空间框架的表征中。错觉对反射性扫视的影响不受内源性控制，也不会因外源性目标信号的强度而受到调节。
