The essay integrates the psychometric intelligence approach with the cognitive-developmental approach or the stage theory erected by Piaget and his disciples. The latter led to Piagetian Cross-Cultural Psychology and the accumulation of an immense body of data. It shows that different IQ levels are indicative of the peculiar stages of cognitive…

Reviews findings of two large adoption studies. Both examined the levels of intellectual and personality development, as well as the degree of resemblance, among family members. Focus is directed toward intelligence quotient and school achievement tests, with briefer attention given to personality interests and attitudes. (Author/RH)

This study was designed to provide empirical support for viewing personality development from a cognitive framework. With controls established for IQ and socioeconomic status, 75 children between 6 and 15 years old were classified by level of cognitive functioning according to Piaget's system. (CS)

Critiques recent research on the effects of birth order on intelligence and personality, which found that the between-family design revealed that birth order negatively related to intelligence, while the within-family design revealed that birth order was unrelated to intelligence. Suggests that it may not be intelligence that co-varies with birth…

This is the latest in a series of reported findings for a Guidance Study which followed the same persons from infancy to age 40. The report focuses on: (1) how well the 50 men and 60 women subjects maintained their positions relative to I.Q. during the 22 years since they were last tested at age 18; (2) gains and losses in I.Q. over the 22 year…

Research supported in part by VRA grant 2569-P.

Subjects were 50 17 year-old students from a variety of types of schools (parochial, private, public) in two New England areas were interviewed for moral and faith development according to the theories of Kohlberg and Fowler. Socioeconomic level and IQ were highly correlated with faith and moral scores. Experiences of the death of someone close…

Investigated long-term effects of infant temperament on problem behavior and cognitive abilities at age 5 years, taking into account interactions between infant temperament and biological and social risk. Found that when high scores on temperamental factors are combined with social or biological risk, the level of later behavioral problems is…

An intervention program for 3, 4, and 5-year-old "high risk" (of low birth weight and with various handicaps) Spanish American children, REPSAC aims at providing successful experiences using the concept of responsive environment in English and Spanish language development and in improving cognitive and affective development. During…

This book reports the experiential deprivation and intellectual retardation of children from the Creche, a Lebanese social agency devoted to the care of foundlings from birth to 6 years. Begun in 1955, this study explored the role of environment, specifically, the effects of adoption, on IQ. Results showed that the mean IQ for both boys and girls…