Researchers concerned with the issue of children's play are urged to read the book "Children's Play: Current Theory and Research" edited by D. J. Pepler and K. H. Rubin which provides an up-to-date review of the conceptual, methodological and developmental issues related to children's play. (MP)

Evaluates empirical studies on child development. Suggests that most such research consists of studies of a priori, nonempirical, logical relations between concepts, whose definitions guarantee the relationship studied. Argues that hypotheses are empirical if variables involved are semantically and logically independent. Research that is not based…

Comments on the ideas espoused by Smedslund (PS 522 552) in this issue. Agrees to the idea of spending more intellectual energy in distinguishing between a priori and empirical hypotheses but emphasizes that concepts are not always accurate reflections of reality and that even empirical disconfirmation of an a priori hypothesis sometimes can…