Individuals with Down syndrome are predisposed to show a specific behavioural phenotype, or a pattern of strengths and challenges in functioning across different domains of development. It is argued that a developmental approach to researching the Down syndrome behavioural phenotype, including an examination of the dynamic process of the unfolding…

Investigated the cognitive development of children with emotional and behavioral difficulties (EBDs). Found that children with EBDs showed a similar order of acquisition of conservation as normal children, and the thinking of children with EBDs was characterized by a high degree of uncertainty. (BC)

Describes examples of adolescent behavior which parents and school personnel find obnoxious. Explains why intelligent, reasonable, and well-adjusted teenagers periodically behave in this way, as something that is developmentally inevitable given the uneven development of competencies in several important areas. Adolescent incompetencies in four…

Adolescent turmoil has been investigated as a manifestation of normative crisis functioning. Anna Freud and Erikson look upon this as almost universal. Daniel and Judith Offer found this quality present in only 21% of their sample of male high school non-patient students. Masterson in his longterm study reported that adolescent turmoil was at most…

Behavior problems are increasing in frequency among preschool children. Thus, preschool teachers must be prepared to manage the increasing disruptive behaviors exhibited in their classrooms. Because positive behavioral management strategies are accepted by teachers and have been proven effective, token economies may be promising interventions to…

This book analyzes the MacArthur Longitudinal Twin Study, a collaborative study by leading developmental scientists and behavioral geneticists on the transition from infancy to early childhood. Part 1 of the book describes the twin method and procedures used and introduces the analytic strategies. Parts 2 through 4 present results related to…