Salapatek P, Aslin R N, Simonson J, Pulos E
Child Dev. 1980 Dec;51(4):1090-4.
Recent evidence has shown that 1- and 2-month-old infants localize a peripheral target by means of a series of saccades. Step size in a series was directly related to target distance, but within a localizing series did not vary appreciably as the line of sight approached the target. The current study examined whether, during localization of a peripheral target, step size and number of steps were determined prior to the first saccade in a localizing series. 2-month-olds viewed peripheral targets which either remained on (continuous condition) or were extinguished (interrupted condition) prior to target localization. It was found that on the majority of trials a series of saccades was made toward the target hemifield. In both conditions the size of each saccade in a multiple saccadic series was approximately equal within a given trial, but varied with initial target distance. Multiple saccades on both continuous and interrupted trials were similar in form, differing only in the total extent of eye rotation. This suggests that a similar oculomotor program was operating under both conditions.
最近的证据表明，1至2个月大的婴儿通过一系列扫视来定位周边目标。一系列扫视中的步长与目标距离直接相关，但在定位系列中，当视线接近目标时，步长变化并不明显。本研究探讨了在周边目标定位过程中，步长和步数是否在定位系列的第一次扫视之前就已确定。2个月大的婴儿观看周边目标，这些目标在目标定位之前要么保持显示（连续条件），要么熄灭（中断条件）。结果发现，在大多数试验中，会朝着目标半视野进行一系列扫视。在两种条件下，在给定试验中，多个扫视系列中每次扫视的大小大致相等，但会因初始目标距离而有所不同。连续试验和中断试验中的多个扫视在形式上相似，只是眼球转动的总幅度有所不同。这表明在两种条件下都有类似的眼动程序在运行。
