The other approach is to balance items so that each group's experience is about equally sampled. Regardless of approach, however, efforts to construct culture-fair intelligence tests have not been too successful. Psychologists clearly do not agree on the heredity vs. environment issue. As a result, the American Psychological Association asked a committee to review the literature and hopefully provide some clarification to this controversy. Neisser et al.
More gifted children come from the upper socioeconomic levels.
Fewer gifted children are emotionally well-adjusted. Gifted children are above average in height, weight, and physical development. Gifted children are less successful in later life. In his classic study of gifted children, Terman studied more than 700 children over a period of 30 years. Children of families in high socioeconomic levels tend to have more and better educational opportunities.