Studied children's transitive inference where representation of premises provided contradictory information depending on position of two elements in a A, B, C series. Eight-year olds did significantly better on the more complex problems than did six-year olds, suggesting the presence of a developmental sequence of algorithms that enable children…

Examined the effect of mothers' familiarity with a formal operations task on performance and monitoring of a cognitive task with their children and on the child's later performance alone. The task-familiar mothers elicted higher level strategies during problem solving and allowed their children to participate more than did the other mothers; their…

Five- to six-year-old children estimated the size of Euclidian objects using an addition rule of Height plus Width, rather than a multiplying rule. Within the framework of information integration theory, tested whether intensive handling of objects would facilitate shift from addition rule to multiplication rule. Found that following handling,…