A series of "world view" or value orientation questions were utilized in generating scale scores that sharply differentiated representative samples of Mexican Americans (280), Negroes (280), and Anglos (413) in a longitudinal study. The original interviews were conducted in 1959, 1960, and 1961. In 1971, seventy-four percent of the original respondents were located again and interviewed. Mexican American respondents were at the "low" end of the scale and Anglos at the "high" end. Results from the 1971 re-interviews revealed that significant convergence had taken place. Mexican American males, females in high income Mexican American families, and Negroes, regardless of sex but more so those in high income then low income families, expressed views more like those of the Anglos than in 1960. When world view was regressed on a variety of background and experimental variables, most of the individual variation in world view among members of each race/ethnic group remained unexplained. This suggests that while members of minority groups are not alike in their responses to statements about world view, the most readily measurable antecedent experiences which supposedly account for within group differences are not as important as more idiosyncratic, unmeasured life experiences. (Author)