Logical Competence in Infancy: Object Percept or Object Concept?
Three experiments are summarized which test Piaget’s explanation for errors in infant manual search. In these studies, all possible combinations of 3 spatial location cues were changed independently between trials at A and at B: a) position defined with respect to the infant (left or right), b) position defined with respect to the cover occluding the object (blue or white), c) position defined with respect to the background on which the object stood.
It was found that patterns of search depend on changes in background and cover cues between trials at A and at B. Furthermore, with constant background and a change in cover infants search correctly, i.e., identify the object over a change in its position. It is concluded that spatio-temporal criteria for identity which are inherent in perception guide search.
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