ABSTRACT Found that under analogous transformations 2nd and 3rd graders (N = 64) tended to conserve both their own and another person's weight prior to conserving the weight of nonhuman objects (a rubber doll and a piece of clay). Findings suggest that children acquire conservation of weight in a sequential manner, with the type of object used in a conservation task affecting the time when conservation is first observed. (PsycINFO Database Record (c) 2012 APA, all rights reserved)
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