Gilmore Rick O, Baker Thomas J, Grobman K H
Department of Psychology, The Pennsylvania State University, PA, USA.
Dev Psychol. 2004 Mar;40(2):259-70. doi: 10.1037/0012-1649.40.2.259.
Although considerable progress has been made in understanding how adults perceive their direction of self-motion, or heading, from optic flow, little is known about how these perceptual processes develop in infants. In 3 experiments, the authors explored how well 3- to 6-month-old infants could discriminate between optic flow patterns that simulated changes in heading direction. The results suggest that (a) prior to the onset of locomotion, the majority of infants discriminate between optic flow displays that simulate only large (> 22 deg.) changes in heading, (b) there is minimal development in sensitivity between 3 and 6 months, and (c) optic flow alone is sufficient for infants to discriminate heading. These data suggest that spatial abilities associated with the dorsal visual stream undergo prolonged postnatal development and may depend on locomotor experience.
尽管在理解成年人如何从视觉流中感知自我运动方向（即航向）方面已经取得了相当大的进展，但对于这些感知过程在婴儿期如何发展却知之甚少。在3项实验中，作者探究了3至6个月大的婴儿区分模拟航向方向变化的视觉流模式的能力有多强。结果表明：（a）在开始自主运动之前，大多数婴儿能够区分仅模拟航向大幅（>22度）变化的视觉流显示；（b）3至6个月大时，敏感度的发展微乎其微；（c）仅视觉流就足以让婴儿区分航向。这些数据表明，与背侧视觉流相关的空间能力在出生后会经历长期发展，并且可能依赖于运动经验。
