Down syndrome is the most common genetic cause of mental retardation and one of the most frequently occurring neurodevelopmental genetic disorders in children. Children with Down syndrome typically experience a constellation of symptomology that includes developmental motor and language delay, specific deficits in verbal memory, and broad…

Arbitrarily applicable derived relational responding has been argued by relational frame theorists to be a form of operant behavior. The present study examined this idea with 4 female participants, ages 4 to 5 years old, who could not perform a series of problem-solving tasks involving arbitrary more than and less than relations. In a combined…

The joint trajectory analysis version of Nagin's ("Group-based modeling of development." Cambridge, MA: Harvard University Press, 2005) semiparametric, group-based approach for modeling trajectories was used to assess how boy's trajectories of conduct problems (CP) and neighborhood SES covaried from ages 5 to 12. Participants were…

Theoretical analysis of two idealized discrimination situations show that certain assumptions of habit strength development need not result in differentiated predictions for the performance of two drive-level groups when the numbers of occurences of responses are equated. (Author)

The natal influences, and the inter- and intrapair intellectual differences of 16 sets of identical twins were evaluated in a retrospective study. (DP)

Study supported by grants from the National Istitutes of Health, U.S. Public Health Service (MH-11979-01), and the National Science Foundation (GS-1847).

Research supported by grant 61 from the Ontario Mental Health Foundation.

MANY COMMON FORMS OF SCHOOL ACCELERATION FOR MENTALLY ADVANCED CHILDREN AND YOUTH ARE INVESTIGATED, THE FINDINGS REPORTED ARE FAVORABLE WITH RESPECT TO BOTH SHORT AND LONG RANGE EFFECTS. D.A. WORCHESTER SUMMARIZED THE ADVANTAGES OF SUCH PROGRAMS AS FOLLOWS--(1) EARLY ENTRANCE HAS THE ADVANTAGE OVER ANY OTHER FORM OF ACCELERATION IN THAT IT SAVES A…

This paper examines the acquisition of superstitious behavior in young children. Six preschool children were exposed to a 15 minute fixed-time inter-reinforcement interval (FT-15") schedule while another six preschoolers were exposed to a 30 minute fixed-time inter-reinforcement interval (FT-30") schedule. In a free-operant laboratory…

This literature review concerns the relationships between imitation-modeling as a learning process and creative behaviors. If it can be demonstrated that creative (unusual, flexible) behaviors are increased upon seeing other creative behaviors modeled, this finding would contradict the simple matching to template interpretation for modeling…

Provides an overview of research on the effects of maternal employment on child behavior and development. (CM)

The goals of this review are to: (1) provide a set of concepts to aid in the understanding of complex processes which occur during central nervous system (CNS) development; (2) illustrate how they contribute to our knowlege of adult brain anatomy; and (3) delineate how modifications of normal developmental processes may affect the structure and…

Investigated adolescent males' recognition of evaluative words spoken near threshold by male and female voices. Closed-style subjects (theoretically characterized by social withdrawal and perceptual blocking) recognized fewer female-spoken (relative to male-spoken) words; this finding is consistent with adaptive-style theory. (DP)

The purpose of phenomenology, which is to reveal to us exactly what we already know and that we know it, is clarified in this analysis of a child's experience. (JC)

Often the victims of white racism are children who by virtue of their lack of maturity and power are unable to cope with its source, meanings, or results. It is within these parameters that this paper presents some sources of racism and briefly sketches survival techniques. Finally, suggestions for strategies and techniques to effect change are…