Virtual twins are unrelated siblings of the same age who are reared together from early infancy (UST-SA). Study uses a sample of 90 UST-SA pairs to comparatively assess the similarity of IQ subtest profile correlations for UST-SAs and twin pairs. Findings support explanatory models of intelligence that include genetic factors, demonstrating that…

The present investigation examined the ability of the Inventory of Home Stimulation (STIM) to predict changes in relative mental test performance of children between 6 months old and 36 months of age. The six STIM subscales were used in discriminant analysis to classify infants into three groups (gainers, stable, losers) in terms of their change…

Examined effects of different environmental measures on individual intellectual growth patterns. Growth curve analyses revealed that HOME scores exerted a constant influence on the expected composite, verbal, and nonverbal intellectual skills at each age. Only SES influenced the rate of growth, specifically nonverbal intellectual skills. (Author)

A total of 23 children were observed from age 1 to 3 in order to assess day-to-day learning environments and their effect on intellectual development. Observers used a time-sampling technique to code behaviors for one hour on three to five separate occasions during each of four periods: age 12-15 months, 18-21 months, 24-27 months and 30-33…

CURRENT RESEARCH INDICATES THAT SCHOOL AND HOME ENVIRONMENTS STRONGLY INFLUENCE AN INDIVIDUAL'S INTELLECTUAL DEVELOPMENT, ALTHOUGH CERTAIN VERY BROAD HEREDITARY LIMITATIONS MAY ALSO AFFECT IT. THE ECONOMICALLY AND EDUCATIONALLY DISADVANTAGED YOUTH EXPERIENCES AN ENVIRONMENT WHICH LACKS STIMULI ESSENTIAL TO POSITIVE INTELLECTUAL GROWTH AND…

Relationships among home environment, nutritional status, maternal intelligence, and intellectual development were investigated for 177 5- and 6-year-old children in the Philippines using culture-relevant scales. Results support the generalizability to the Philippine cultural setting of relationships among these factors found in American settings.…

Studies conducted with middle-class balanced bilinguals in "additive" environments, where both languages are prestigious, have generally reported that bilinguals showed a higher level of cognitive performance than monolinguals. In these studies, bilinguals showed higher levels of general intellectual skills, higher levels of divergent thinking, a…

This study focuses on the effects of family size and spacing on intellectual, social, and personality development of children. The sample consisted of 533 suburban, middle class, large family (five or more) and small two child family children. The children, 233 boys and 300 girls, were teenagers attending either junior or senior high school.…