Describes characteristics of second-generation research in early intervention, that is, greater specificity, the use of more rigorous scientific standards, and an increased understanding of biosocial relationships than in initial investigations. Examines studies conducted by Utah State University's Early Intervention Research Institute in the…

This paper presents Down's syndrome as a part of the human race's rich biological inheritance rather than a condition to be pitied. The history of the discovery of the biological basis of Down's syndrome is reviewed, along with attitudes toward individuals with Down's syndrome over time and developments in medicine and education. (JDD)

Genetic effects on specific cognitive abilities as distinct from those on general cognitive ability were studied in 302 pairs of twins (some reared together, some apart) from the Swedish Adoption/Twin Study of Aging. Overall, results showed significant genetic influence on specific abilities independent of influence on general ability. (SLD)

States that teaching the concepts of evolution to secondary school and college students is difficult. Presents a playing card game-based simulation that teaches the complex idea of natural selection in a simple, nonthreatening way. Includes three figures, one table, and step-by-step instructional procedures. (CFR)

Using a connectionist framework, it is possible to develop models exploring effects of biologically relevant variables on behavior. The ability of such models to explain schizophrenic behavior in terms of biological disturbances is considered, and computer models are presented that simulate normal and schizophrenic behavior in an attentional task.…

This article examines the descriptive influences of reading and learning disorders on personality development. It discusses the effects of biologic vulnerabilities and environmental interaction, the variant patterns of defense and symptom development at various life stages, and evidence that early development failures are key elements in later…

Twenty-eight adults with Down's syndrome and 28 adults with retardation of unknown origin responded to a language elicitation test. The adults with Down's syndrome exhibited an almost universal failure in mastering individual elements of the auxiliary verb system. The nature and source of biological constraints on language learning and…

Adolescents experience numerous changes; coping with a chronic illness adds yet another dimension to their lives. This paper reviews the literature on chronically ill adolescents, addressing social, biological, psychological, cognitive, and cultural issues. (Author)

This article reviews competing theories of semantic organization in the brain, including modular models, unitary models, and the matrix theory, and provides supporting and refuting evidence for each, incorporating examples from the imaging literature. The literature does provide some support for distinct neural substrates that process specific…

Research on intergenerational continuities should consider: (1) both sides of the family; (2) the effect of change on continuities; (3) discontinuities; (4) societal and family influences; (5) variations in the meaning of traits; (6) misleading differences; (7) risks derived from personal characteristics and experiences; (8) identification of…

Used behavioral genetic methods and environmental assessment techniques to assess maladaptive behavior in 6- to 11-year-old twin pairs. Found that genetic variation accounts for majority of variance in parent-reported child maladaptive behavior; in contrast, observational coding and global impressions of parent-twin interactive behavior suggest…

Presents five guidelines for school social workers to be used for planning interventions with children and adolescents diagnosed with conduct disorders. These guidelines are based on a synthesis of child development research and suggest that attention to the biological makeup of students as well as the design of multimodal and multisystemic…

Examines the possible role of maturational constraints on first language acquisition and second language learning. Reviews research on the special circumstances of delayed first language acquisition and the effects of age on second language learning. Suggests that ability to attain native-speaker grammatical competence may diminish long before…

This article reviews recent research in the field of learning disabilities and, in particular, dyslexia. It summarizes findings from numerous studies employing widely divergent methodologies that have attempted to establish the neurobiological correlates of learning disabilities and concludes that it is impossible to deny a neurobiological basis…

Examined heritability of reading deficits in dyslexic subtypes. Found reading deficits were heritable in developmental phonological and surface dyslexics, with greater genetic contribution in the former. Findings suggest a partial independence in the development of cognitive processes involved in reading, and affirm accounts of surface dyslexia…