THE INTELLECTUAL TEST DIFFERENCES BETWEEN NEGRO AND WHITE FIRST- AND FIFTH-GRADERS OF DIFFERENT SOCIAL CLASSES WERE CONSIDERED. THE LORGE-THORNDIKE, LEVEL I, PRIMARY BATTERY WAS USED FOR FIRST GRADERS, AND LEVEL III FOR FIFTH GRADERS. IT WAS CONCLUDED THAT RACE INFLUENCE TENDS TO BECOME MORE MANIFEST AND CRUCIAL AS THE SOCIAL CLASS LEVEL…

Cumulative deficit is an hypothesis concerning the cause of lower mental test scores of groups considered environmentally deprived. It presupposes a progressive decrement in test scores, relative to population norms, as a function of age. Clarification of the theoretical issues and the methodological problems involved in establishing the…

The rod and frame performance of 70 children, 5 to 7 years of age, with respect to sex and age differences, reliability, and its relationship to general intelligence, was investigated. The rod and frame test was administered individually and again following a period of 35 to 69 days, at which time the Lorge Thorndike Intelligence Test, form 1A,…