Abstract
Two experiments evaluated various explanations of the AB error—the error made at eight or nine months, when the infant will search a pervious hiding place, A, for an object which has been hidden at a new place, B—by testing what sorts of manipulations, if imposed after the hidings at A, would allow the infant to find the object at B. The results support Piaget, 1952 , Piaget, 1954 intercoordination of schemes explanation; discount Gratch's (1975) place, Harris's (1973) proactive interference, and Moore's (1975) object identity explanations of the error; and present a new kind of evidence for the existence of shapes in infancy.
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