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Marcovitch, Stuart; Zelazo, Philip David – Journal of Cognition and Development, 2006
Age-appropriate modifications of the A-not-B task were used to examine 2-year-olds' search behavior. Several theories predict that A-not-B errors will increase as a function of number of A trials. However, the hierarchical competing systems model (Marcovitch & Zelazo, 1999) predicts that although the ratio of perseverative to nonperseverative…
Descriptors: Toddlers, Child Behavior, Models, Error Patterns