In this paper, data generated in the intermediate-size transposition paradigm under a variety of experimental conditions are related to a 2-process model involving perceptual and cognitive components. (Author/JMB)

Reviews Greenough, Black, and Wallace's (1987) conceptual framework for understanding the effects of early experience and sensitive periods on development, and illustrates the applicability of their model with recent data on the consequences for animals and human infants of the acquistion of self-produced locomotion. (BN)

Maintains that one future direction for cognitive development research involves a closer integration with knowledge about the developing brain. Presents a framework for analyzing and interpreting postnatal functional brain development. Discusses three contributing hypotheses, within which a variety of phenomena associated with the neural basis of…

Reviews a series of studies documenting that key aspects of helpless reactions to failure are present in preschool and early elementary school children. Proposes a preliminary model in which a general conception of self and the notion of this self as an object of contingent worth are sufficient conditions for helplessness. (HTH)