Neal and Johnson's (1996) study of wages, race, and standardized test scores found less discrimination against high-test-score blacks . evidence of discrimination against blacks by white coworkers that a person's performance on a standardized test as a teenager is essentially unrelated to that person's wage 10-15 years later. that nearly all of the black -white wage gap of 26-29 - year -olds is due to an educational - achievement gap when those workers were still in high school