Intellectual engagement (IE) refers to enjoyment of intellectual activities and is proposed as causal for knowledge acquisition. The role of IE for cognitive development was examined utilizing 2-year longitudinal data from 112 ninth graders (average baseline age: 14.7 years). Higher baseline IE predicted higher baseline crystallized ability but…

Evidence from twin studies points to substantial environmental influences on intelligence, but the specifics of this influence are unclear. This study examined one developmental process that potentially causes intelligence differences: learning to read. In 1,890 twin pairs tested at 7, 9, 10, 12, and 16 years, a cross-lagged…

Alumni self-ratings of their personal growth were linked to their intellectual development during college four to seven years earlier. Graduates that were satisfied with their personal growth in the arts, creative thinking, making logical inferences, learning independently, exercising initiative, and tolerating other points of view had higher…

Examines intellectual and metacognitive development of 300 male college students in a longitudinal design. Although the change in Dualism and Relativism confirmed previous research, Commitment, Empathy, and metacognitive measures followed a V-shaped discontinuous path. Intellectual and metacognitive development was found to vary with academic…

Examined the origins of high general cognitive ability (g) in twins who were participating in the MacArthur Longitudinal Twin Study. Formed high g groups from the 19th percentile and above at each age. Results suggested increasing genetic influence and increasing genetic stability from 14 to 36 months and substantial genetic influences with…

This study examines the longitudinal relationships between mastery motivation and differentiated measures of intellectual development assessed at 1 and 3 1/2 years of age in a sample of 35 children (21 boys and 14 girls). At one year three types of mastery motivation were assessed using structured tasks: (1) producing effects (engaging in…

Reports a two-year longitudinal study of 55 adolescents and young adults who were divided into three groups and given Reflective Judgment Interviews and the Concept Mastery Test to investigate sequentiality of reflective judgment stages. Results indicate support for seven hypothesized shifts in epistemic assumptions over time.(Author/RH)

The Infant Health and Development Program (IHDP), an eight-site randomized controlled trial of a comprehensive intervention program combining home visits, child centers, and parent meetings with pediatric follow-up and referral, effectively reduced the incidence of health and developmental problems in a sample of 377 low birth weight, premature…

The results of this study highlight the cognitive intellectual aspect of the speed of behavior. These findings supplement Hunt's studies of the relationships between speed of cognitive processing and performance of young adults on conventional tests, and emphasize the importance of cognitive speed for subsequent intellectual development. (Author)

The Fullerton Longitudinal Study is a contemporary prospective investigation that spans approximately a quarter of a century. Commencing at age 1, children and their families were systematically followed every 6 months from infancy through preschool and annually at ages 5 through 17. They were again assessed at age 24. The course of development…

Findings of this three-year longitudinal study, based on 172 African American students, suggest that attendance at an historically Black college significantly enhances the intellectual growth of African American students. The findings held for both standardized, objective measures of reading comprehension, and for self-reported measures of gains…

Reexamines Yoruba children from educated and traditional families after five years, finding that those growing up in a privileged environment showed increasingly superior mental scores. (Author/JM)