Five- and 7-month-old infants' sensitivity to the pictorial depth cue of height-in-the-picture-plane was assessed. Infants were presented with 2 objects, 1 higher than the other, and their reaching was recorded under monocular and binocular viewing conditions. The results showed that both age groups reached significantly more to the lower,…

Several investigations have shown that young infants perceive the unity of a center-occluded object when the visible ends of the object undergo common motion but not when the object remains stationary. This study is an extension of earlier investigations on object unity in that it assesses amodal completion of stationary circles in which one half…

Sixty-four infants viewed side-by-side videotapes of toy trains (in four visual conditions) and listened to sounds at increasing or decreasing amplitude designed to match one of the videos. Results suggested that five-month olds were sensitive to auditory-visual distance relations and that change in size was an important visual depth cue. (MDM)