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Craton, Lincoln G.; Yonas, Albert – Child Development, 1988
A sample of 44 infants of five months of age showed a significant reaching preference for the apparently nearer region of a computer-generated display. This indicated that the infants were sensitive to boundary flow information for depth at an edge. (RH)
Descriptors: Cognitive Development, Depth Perception, Infants, Spatial Ability

Skouteris, H.; And Others – Child Development, 1992
Results of 3 experiments indicated that 12 month olds, but not 8 and 10 month olds, looked longer at objects of a different shape from test objects than at the test objects. Twelve month olds recognized rectilinear, but not curvilinear, forms. They recognized differences in forms for three-dimensional, but not two-dimensional, objects. (BC)
Descriptors: Age Differences, Depth Perception, Infants, Spatial Ability

Gordon, F. Robert; Yonas, Albert – Journal of Experimental Child Psychology, 1976
In order to study infants' sensitivity to binocular information for depth, 11 infants, 20 to 26 weeks of age, were presented with real and stereoscopically projected virtual objects at three distances, and the infants' reaching behavior was videotaped. (Author/SB)
Descriptors: Depth Perception, Infants, Perceptual Development, Research
Ball, William A. – 1975
A looming paradigm was used to determine what depth information infants process in addition to that provided by the expansion of a single, closed contour of an object. A total of 18 male and 15 female infants aged 22-48 days watched a film in which the circular elements and inter-element spaces of the projected image alternately expanded and…
Descriptors: Depth Perception, Infant Behavior, Infants, Motor Reactions
Kavsek, Michael – Journal of Cognition and Development, 2004
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…
Descriptors: Infants, Visual Stimuli, Geometric Concepts, Cues

Kaufmann, Ruth; And Others – Journal of Experimental Child Psychology, 1981
An Ames static trapezoidal window was used to test infants' responsiveness to pictorial depth. Sensitivity to the pictorial information for depth that is present in the trapezoidal window appears to develop after the age of 22 weeks. (Author/DB)
Descriptors: Age Differences, Depth Perception, Infant Behavior, Infants
Smith, W. Carter; Johnson, Scott P.; Spelke, Elizabeth S. – Cognitive Psychology, 2003
Although much evidence indicates that young infants perceive unitary objects by analyzing patterns of motion, infants' abilities to perceive object unity by analyzing Gestalt properties and by integrating distinct views of an object over time are in dispute. To address these controversies, four experiments investigated adults' and infants'…
Descriptors: Intervals, Infants, Motion, Experiments

Kavsek, Michael J. – Journal of Experimental Child Psychology, 1999
Studied infant ability to extract depth information from a three-dimensional structure. Found evidence that 8-month-old infants distinguished between lines indicating edges, and lines indicating markings, and that they are able to use line junctions to perceive line drawings as depicting three-dimensional objects in the picture plane. (Author)
Descriptors: Depth Perception, Infants, Pictorial Stimuli, Vision Tests

Field, Jeffery – Developmental Psychology, 1976
The reaching behavior of 12 infants in the presence of solid objects and pictures of objects placed within and beyond possible contact distance was videotaped in three sessions at 15, 19, and 24 weeks of age. (Author/MS)
Descriptors: Behavioral Science Research, Depth Perception, Early Childhood Education, Eye Hand Coordination