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Perception, 1998, volume 27, pages 341 -353 Young infants' perception of illusory contours in dynamic
 

Summary: Perception, 1998, volume 27, pages 341 -353
Young infants' perception of illusory contours in dynamic
displays
Scott P Johnson
Department of Psychology, Texas A&M University, College Station, TX 77843, USA;
e-mail: spj@psyc.tamu.edu
Richard N Aslin
Center for Visual Science, University of Rochester, Rochester, NY 14623, USA
Received 10 September 1996, in revised form 3 January 1997
Abstract. Ninety-six 4-month-old infants were habituated to one of three computer-generated
displays depicting two rod parts above and below an occluding box. In the first display, the
surfaces and boundaries of the rod and box were specified by dense surface texture. Their depth
segregation was specified by accretion and deletion of background texture and motion shear.
In the second display, the unity of the rod parts and box, and their depth segregation, were speci-
fied only by illusory contours. In the third display, the boundaries of the rod and box were
specified by illusory contours, perceptible only via spatiotemporal integration of accretion and
deletion of sparse-background-texture elements. Infants appeared to perceive object unity, and
segregate the rod and box surfaces, in all three displays, indicating use of illusory contours to
perceive bounded surfaces in depth. The results suggest a cognitive contribution to perception
of some illusory contours, abilities which seem to be present by at least 4 months of age.

  

Source: Aslin, Richard N. - Department of Brain and Cognitive Sciences, University of Rochester

 

Collections: Biology and Medicine