Infants' perception of information along object boundaries: concavities versus convexities

Journal of Experimental Child Psychology
Ramesh S BhattJane E Joseph

Abstract

Object parts are signaled by concave discontinuities in shape contours. In seven experiments, we examined whether 5- and 6 1/2-month-olds are sensitive to concavities as special aspects of contours. Infants of both ages detected discrepant concave elements amid convex distractors but failed to discriminate convex elements among concave distractors. This discrimination asymmetry is analogous to the finding that concave targets among convex distractors pop out for adults, whereas convex targets among concave distractors do not. Thus, during infancy, as during adulthood, concavities appear to be salient regions of shape contours. The current study also found that infants' detection of concavity is impaired if the contours that define concavity and convexity are not part of closed shapes. Thus, for infants, as for adults, concavities and convexities are defined more readily in the contours of closed shapes. Taken together, the results suggest that some basic aspects of part perception from shape contours are available by at least 5 months of age.

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Citations

May 4, 2010·Attention, Perception & Psychophysics·Ramesh S BhattJane E Joseph
Mar 19, 2009·Psychonomic Bulletin & Review·Angela HaydenAshley Kangas
Aug 10, 2011·Attention, Perception & Psychophysics·Ashley KangasRamesh S Bhatt
Nov 29, 2012·Psychonomic Bulletin & Review·Marco Bertamini, Johan Wagemans
Jan 30, 2013·Psychonomic Bulletin & Review·Ashley KangasRamesh S Bhatt
Oct 19, 2016·Developmental Psychobiology·Ashley GalatiRamesh S Bhatt
Jul 21, 2011·Seeing and Perceiving·Bart Ons, Johan Wagemans
Jan 1, 2018·Visual Cognition·Paul C Quinn, Ramesh S Bhatt
Mar 1, 2011·Infancy : the Official Journal of the International Society on Infant Studies·Gelareh Jowkar-Baniani, Mark A Schmuckler
Sep 1, 2007·Infancy : the Official Journal of the International Society on Infant Studies·Ramesh S BhattPaul C Quinn

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