A conceptual framework of cognitive growth is sketched and a mathematical model of cognitive growth is presented with the conclusion that the most plausible model is a model of logistic growth with delayed feedback. The model is transformed into a dynamic systems model based on the logistic-growth equation. (SLD)

This study, which assessed hypothesis-testing abilities using a discrimination-learning paradigm, found that 16 language-impaired primary-level children solved fewer problems than 16 controls equated on cognitive level, but the 2 groups used similar hypothesis types to solve the problems. Type of verbal feedback (explicit versus nonexplicit) did…

This study investigates how children, who have acquired a basic speech repertoire, introduce dialogues and how they then pursue their communicative purpose in the course of interaction. The subjects were 20 kindergarten children and 20 second graders, ranging in age from 5 to 5 1/2 and from 7 to 7 1/2. The significant questions pursued were: (1)…

This monograph, the fourth in a series pertaining to the Early Childhood-Special Education Teacher Preparation Program at the University of Virginia, describes the highly structured directive teaching process. The foremost example of the directive teaching process is the Bereiter-Englemann model which is geared toward alleviating the language and…

The ability of at-risk and handicapped infants and toddlers to interact with microcomputers was studied. One research phase focused on the parameters (motor, language, and cognitive developmental levels) for using the microcomputer. The overall project examines eight levels of use culminating in using a menu driven program for making choices to…