An experiment involving a Group X Training or No-training design does not logically permit conclusions concerning the genetic or nongenetic causes of the main effect of the group differences or their interaction with treatments, nor can such a design reflect on the culture-fairness of the measuring instrument. For related article, see TM 502 302.…

The two-level theory of mental abilities posits two broad classes of ability: level I (learning and memory) and level II (the "g" factor of intelligence tests, reasoning, abstraction, and problem solving). Levels I and II are hypothesized to interact with SES and/or race such that: (l) SES differences are greater for level II than for I,…

An entire elementary school system with 60 percent white and 40 percent black children was given several ability tests administered by 12 white and eight black examiners. The tests measured verbal and nonverbal IQ, perceptual-motor cognitive development, "speed and persistence" under neutral and motivating instructions, listening attention, and…

Results of a comparison of 73 Anglo American and 155 Chinese American (CA) fourth through sixth graders on an intelligence test and measures of the speed and consistency of retrieval of arithmetic facts from long-term memory are consistent with the hypothesis that accessing elementary arithmetic knowledge is more completely automatized in CA…

This report contains a series of studies which represent ongoing research of six investigators, who seek to elucidate through empirical studies the psychological characteristics of culturally disadvantaged children. The chief aim has been to make comparative analyses of abilities and learning characteristics of children from intact subpopulation…