Notes the self-conscious reflection that emerges in the fifth edition of the "Handbook of Child Psychology." Identifies several dichotomies in developmental psychology, such as change as variational or transformational, and sees these dichotomies in the context of modernist and postmodernist attitudes. Suggests that developmental…

Focused on the developmental acquisition of the conditional implication interpretation of "if-then." Knowledge of three aspects of this interpretation was assessed for adults and 3rd-, 5th- and 8th-graders. Results showed the older three groups were significantly more likely to understand conditional implication, with improvement…

The development of multiplicative classificatory skills in children between 4 and 9 years of age was investigated by means of two forms of the matrix-completion task. (Authors)

Major finding of this study demonstrates clear support for the proposed developmental sequence of gestural representation. (Authors)

Examines development of representational thought from the perspective of Jean Mandler's image-schema theory and an action-theoretical approach derived from Piaget's theory. Concludes that empirical findings fail to support hypotheses of early onset, and that representational development is more adequately interpreted within the context of an…

Examines the development of the child's concepts of certainty and uncertainty within the context of concrete and propositional reasoning tasks. Subjects were first, third, and fifth graders. Findings support the position that reasoning about concrete certainty and uncertainty requires a different competence than that required for reasoning about…