Stiles-Davis J
J Exp Psychol Gen. 1986 Mar;115(1):96-7.
Hofsten and Spelke (1985) reported a series of studies that quite clearly demonstrated infant sensitivity to depth and relative motion cues. They suggest a salience hierarchy for those cues in which relative motion takes precedence over depth when both cues are present. Based on reports that infants reach for and grasp boundaries in the visual display, the authors make the further claim that these data argue for object perception infants by the time they are 5 months old. The present article argues against this claim on two grounds: First, the authors do not report that infants specifically reached and grasped at boundaries in the display. Second, although patterns of reach are clearly affected by changes in boundary cues, there is no evidence that the boundaries the infants perceive are necessarily object boundaries.
霍夫斯滕和斯佩尔克（1985年）报告了一系列研究，这些研究非常清楚地证明了婴儿对深度和相对运动线索的敏感性。他们提出了这些线索的显著性等级，当两种线索都存在时，相对运动比深度更占优先地位。基于婴儿在视觉展示中伸手去够并抓住边界的报告，作者进一步声称，这些数据表明婴儿在5个月大时就有物体感知能力。本文基于两个理由反对这一说法：第一，作者没有报告婴儿特别在展示中的边界处伸手并抓住。第二，虽然伸手模式明显受到边界线索变化的影响，但没有证据表明婴儿所感知到的边界必然是物体边界。
