Explores the nature and consequences of developmental change in speed of information processing. Summarizes evidence indicating that age differences in processing speed reflect a global mechanism that limits processing speed on most tasks. Describes evidence that suggests a role for processing speed on the development of intelligence. (Author/MKA)

The study examined whether an awareness that semantic organization is beneficial to picture recall ("semantic enhancement") precedes an awareness that certain types of organization are more beneficial than others ("levels of processing"). A series of pilot studies was conducted with kindergarten and adult subjects and a formal…

Determined that males (N=70) demonstrate higher level of intellectual development than females (N=70), that males mature intellectually earlier than females, and that there appear to be factors other than age and sex that are related to development of formal operational reasoning. Implications of these and other results are discussed. (JN)

Birth order effects on intellectual performance show both positive and negative results. Considers the intellectual aspects of siblings' changing environments, explaining that birth order and family size effects depend crucially on the age at which children are tested. Within-family data conceal patterns of aggregate effects that are revealed by…

Surveys 278 British high school students concerning musical styles preferences. Generally speaking, students rejected classical and "serious" music as they grew older. Girls exhibited acceptance of a wider range of musical styles. Includes statistical tables. (MJP)

This paper describes the development of children's ability to pose and answer questions and discusses the teacher's role in enhancing these problem-solving skills. Several chapters review theoretical and empirical work related to these issues: models of man, general intellectual development, the mother's role in children's intellectual development…