The link between the quality of attachment in infancy and the quality of play and problem-solving behavior at age two years was examined in 48 infants. (Author/JMB)

Investigated the effectiveness of a training procedure corresponding to a component analysis of a hypothesis-testing task in improving kindergarten children's problem-solving abilities. (Author/JMB)

Children 6 and 11 years of age were given a recall task in which the perceptual salience of the information and the type of conceptual evaluation required for solution (analysis or synthesis) were varied. (Author/JMB)

This study examined the hypothesis that differences in performance of impulsive and reflective children on the "20 questions" test are due to individual differences in preferred perceptual processing strategy rather than in cognitive maturity of problem-solving strategy. (Author/JMB)

Study 1 asked second through sixth graders, who could answer inclusion questions, to answer such questions without empirical information about relative quantity and to predict whether subordinate classes could be made larger than their superordinate classes. In study 2, children's performance in two part-whole domains, classes and collections, was…

Cognitive organization in problem solving was investigated using a transfer paradigm. (SB)