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Shutts, Kristin; Ornkloo, Helena; von Hofsten, Claes; Keen, Rachel; Spelke, Elizabeth S. – Child Development, 2009
Three experiments investigated changes from 15 to 30 months of age in children's (N = 114) mastery of relations between an object and an aperture, supporting surface, or form. When choosing between objects to insert into an aperture, older children selected objects of an appropriate size and shape, but younger children showed little selectivity.…
Descriptors: Object Permanence, Young Children, Experiments, Age Differences