Lévy-Schoen A, Coëffé C, Jacobs A M
Laboratoire de Psychologie Expérimentale, CNRS UA316, Université René Descartes, Paris, France.
Brain Behav Evol. 1989;33(2-3):80-4. doi: 10.1159/000115904.
In most normal visual search situations, the environment is filled with a variety of stimuli, and selection among possible saccade targets is necessary. Current theories of visuomotor mechanisms must take into account not only the classical 'retinal error' input signal, but also perceptual and decisional factors as well as task-specific strategies adopted by the subjects. Experiments are reported in which eye movements are recorded in tasks requiring ocular saccades to be made onto target letters indicated by a peripherally visible mark or embedded within lines of homogeneous background letters. The results show how nonsensory factors interact with visual determinants in the preparation of the exploratory saccades. Expectations concerning the visibility of the sought-for target influence the spatial and temporal parameters of the eye movement which will be executed.
在大多数正常的视觉搜索情境中，环境中充满了各种刺激，因此有必要在可能的扫视目标之间进行选择。当前的视觉运动机制理论不仅必须考虑经典的“视网膜误差”输入信号，还必须考虑感知和决策因素以及受试者采用的特定任务策略。本文报告了一些实验，在这些实验中，记录了在需要将眼球扫视到由周边可见标记指示或嵌入在均匀背景字母行中的目标字母的任务中的眼动情况。结果表明了非感觉因素在探索性扫视准备过程中如何与视觉决定因素相互作用。对所寻找目标可见性的预期会影响即将执行的眼动的空间和时间参数。
