Pragmatic and semantic problem solving are examined as processes that enhance acquisition of mathematical knowledge. It is suggested that development of mathematical cognition involves restructuring and that math teachers can help restructure children's knowledge systems by providing them with situations in which semantic and pragmatic problem…

Argues that recent emphasis in second-language research has been on the communication situation of the language learner and on the features of input and individual differences in learning style that affect how the interlanguage develops. Suggests that research is needed on the interaction of situational and personal variables. (MP)

Discusses research in creativity with particular emphasis on the problems encountered in assessing creativity from a life-span developmental framework. Alternative developmental models and measures are discussed as future research recommendations for the assessment of life-span creativity. (Author/RH)

The pattern of parent-child correlations in adoption studies has long been interpreted to suggest substantial additive genetic variance underlying variance in IQ. The studies have frequently been criticized on methodological grounds, but those criticisms have not reflected recent perspectives in genetics and developmental theory. Here we apply…

Discusses many factors involved in determining the complex nature of a child's knowledge base. Includes three kinds of considerations: 1) task-oriented criteria; 2) motivational elements; and 3) the relationship between personality and performance. (Author/CS)

Surveys 33 developmental studies using 12 different locus of control scales in the effort to learn how perceived internal control changes with age. A few studies show developmental declines in perceived control, about half show consistent developmental increases, and about half show mixed results or no significant developmental differences.…

Studies the effects of perceptual salience on performance in problems requiring the coordination of information. Subjects were groups of children, younger adults, and older adults. For each of the age groups, those problems containing the most salient information were solved faster and more accurately than problems containing the least salient…

Five symposium papers evaluate the usefulness of ideas associated with the life-span view for enriching, highlighting, or expanding issues, theory, and research pertinent to change processes during infancy, childhood, adolescence, and adulthood, and for intervention programs during these periods. (Author/MP)

Proposes causal field theory as a model of causal reasoning. Suggests that anomaly detection through comparison with natural events triggers causal reasoning. This anomaly is interpreted in terms of agency; therefore, natural phenomena can be understood through an appeal to agency. The mechanism proposed never changes with development, whereas…