During research reported here, the author held a Fulbright-Hayes Fellowship. (VM)

These results support Piaget's position that preoperational children respond to the perceptual lack of equality but not to the lack of conceptual equivalence in class-inclusion problems. (Authors)

Study was designed to provide further evidence on the speed of development of the acquired distinctiveness and equivalence effects during the transfer task. (Author)

Three experiments are reported that were designed to test the effectiveness of two training procedures, one perceptual, the other verbal, on upgrading the conceptual behavior of preschool children. (Authors/MB)

This study demonstrates the general developmental progression of the increased internalization of the conditions of emotional arousal. Females show a tendency to be more dependent than males on external arousal cues. (Authors)