The development of perceptual completion abilities: infants' perception of stationary, partially occluded objects.

We explored infants' ability to perceive stationary, partially occluded objects as connected units (Experiments 1 and 2) with specific appearances (Experiment 3). In each experiment, the infants saw 2 test events involving what appeared to adults to be a tall rectangular object whose middle portion was hidden behind a narrow screen. During the test events, the screen alternately uncovered and covered the object. In Experiments 1 and 2, removal of the screen revealed either a single, connected rectangle (complete object event) or an interrupted rectangle with a gap where the screen had been (broken object event). In Experiment 3, removal of the screen revealed either a rectangle (rectangle event) or a cross-shaped object (cross-shape event). The pattern of infants' looking times at these events suggest that they perceive the unity of the partially occluded object by 6.5 months of age but did not perceive the form of the hidden part of the object until 8 months. The results of baseline control conditions support this interpretation.

[1]  Albert Yonas,et al.  The Development of Sensitivity of Kenetic, Binocular and Pictorial Depth Information in Human Infants , 1985 .

[2]  H. Ghim,et al.  Evidence for perceptual organization in infants: Perception of subjective contours by young infants , 1990 .

[3]  C. Granrud.  Binocular vision and spatial perception in 4- and 5-month-old infants. , 1986, Journal of experimental psychology. Human perception and performance.

[4]  P. Kellman,et al.  A theory of visual interpolation in object perception , 1991, Cognitive Psychology.

[5]  E. Spelke,et al.  Perception of partly occluded objects in infancy , 1983, Cognitive Psychology.

[6]  Paul C. Quinn,et al.  Part—whole perception in early infancy: Evidence for perceptual grouping produced by lightness similarity , 1993 .

[7]  A. Yonas,et al.  Space perception in infancy , 1987 .

[8]  R. Held,et al.  Stereoacuity development for crossed and uncrossed disparities in human infants , 1982, Vision Research.

[9]  K Nakayama,et al.  Stereoscopic Depth: Its Relation to Image Segmentation, Grouping, and the Recognition of Occluded Objects , 1989, Perception.

[10]  E. Spelke,et al.  Perceiving and reasoning about objects: Insights from infants , 1993 .

[11]  Rosaleen A. McCarthy,et al.  Spatial Representation: Problems in Philosophy and Psychology , 1993 .

[12]  K. Koffka.  Principles Of Gestalt Psychology , 1936 .

[13]  Alan Slater,et al.  Newborn and older infants' perception of partly occluded objects☆ , 1990 .

[14]  E. Spelke,et al.  Perceptual completion of surfaces in infancy. , 1987, Journal of experimental psychology. Human perception and performance.

[15]  A Yonas,et al.  Sensitivity to binocular depth information in infants. , 1976, Journal of experimental child psychology.

[16]  M. Haith,et al.  Infant visual response to gestalt geometric forms , 1984 .

[17]  E. Spelke,et al.  Gestalt relations and object perception in infancy , 1984 .

[18]  A. Yonas,et al.  Four-month-old infants' sensitivity to binocular and kinetic information for three-dimensional-object shape. , 1987, Child development.

[19]  P J Kellman,et al.  Object and observer motion in the perception of objects by infants. , 1987, Journal of experimental psychology. Human perception and performance.

[20]  A. Yonas,et al.  Infants' sensitivity to boundary flow information for depth at an edge. , 1988, Child development.

[21]  Terri Gullickson,et al.  Annals of Child Development , 1995 .

[22]  B. Bertenthal,et al.  Development of visual organization: the perception of subjective contours. , 1980, Child development.

[23]  E. Spelke,et al.  Infant perception of object unity from translatory motion in depth and vertical translation. , 1986, Child development.

[24]  R. Held,et al.  Stereoacuity of human infants. , 1980, Proceedings of the National Academy of Sciences of the United States of America.