The mean average difference previously recorded between blacks and whites on intelligence may be an artifact based upon the differences in education and socioeconomic position of blacks and whites in this country. Previous studies in this area, with a few exceptions, have been comparing
lower class blacks with second-third through tenth generation middle class whites. Only recently in this country has a true black middle class emerged that has had access to both education and income. Even though black income nationally is still only 61% of white income, the black middle
class income has approached 75% of white income. This increase in disposable income is being invested in youth development. Second generation black youth of middle class status will show many attributes of the American achievement syndrome. The black youth in this study exceeded the
white sample mean on the Stanford-Binet and the WISCR. The black mean was 128.63 with a standard deviation of 14.44, while the white mean was 115.75 with a standard deviation of 13.37. The difference was significant at the 0.001 level.