Document Detail

Infant perception of object unity from translatory motion in depth and vertical translation.
MedLine Citation:
PMID:  3948595     Owner:  NLM     Status:  MEDLINE    
Previous research indicated that 4-month-old infants perceive the unity of a center-occluded object when its visible ends share a common lateral translation in space. The present work investigated the class of motion relationships that can specify object unity to infants, specifically, asking whether it includes all rigid translations. 3 experiments tested the informativeness of 2 axes of translation not previously studied: translation in depth and vertical translation. These motions also allowed assessment of certain interpretations of previous results that invoke specific sensory consequences of lateral movement, rather than perceived motion, as underlying perceived unity. Experiment 1 provided evidence that a small extent of translation in depth specified the unity of an object, but only to the subgroup of infants who detected the motion. Experiment 2 used a greater displacement in depth and found clear evidence for perception of object unity. Experiment 3 indicated that vertical translation, in which the 2 visible areas of the partly hidden object undergo dissimilar changes, also specifies object unity to infants. These results suggest that infants' perception of object unity depends on perceived coherence of motion, no matter how specified, and that the class of informative motions includes all rigid translations.
P J Kellman; E S Spelke; K R Short
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Child development     Volume:  57     ISSN:  0009-3920     ISO Abbreviation:  Child Dev     Publication Date:  1986 Feb 
Date Detail:
Created Date:  1986-04-17     Completed Date:  1986-04-17     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0372725     Medline TA:  Child Dev     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  72-86     Citation Subset:  IM    
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MeSH Terms
Child Psychology*
Depth Perception*
Discrimination Learning
Form Perception*
Habituation, Psychophysiologic
Motion Perception*
Perceptual Closure
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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