Subjects were Zambian elementary school children, ages 7-17, providing evidence of weight conservation behavior and those who did not; principal dependent variable was performance on locally-developed psychometric measures of reasoning ability. Very little connection was found between the conservation-status of the subjects and their performance…

Three studies were conducted to develop and evaluate a diagnostically based curriculum for disadvantaged preschool children. The population consisted of 139 white and 4 Negro Appalachian 5-year-olds from the lowest socioeconomic class, who scored from 50 to 85 on the 1960 Stanford-Binet L-M Intelligence Scale. One of the 3 groups organized…