The greater one's aptitude for these activities, the more knowledge and skill will be gained by performing them. Thus aptitude for learning is measured by a good test of the knowledge and skills that have been learned. Moreover, a person with greater innate capacity for these activities is more likely to develop a greater aptitude for them. His answer is yes, which is true as far as it goes. But he overlooks genes, a major contributor.
People enter the world with different kinds and degrees of talent.
Their underlying potential for verbal and mathematical learning and reasoning varies enormously. Although the genetic contribution to the racial gaps in test scores is uncertain, psychometricians agree that genes are a primary cause of the tremendous individual variance within races. No one in the colloquy thus far has provided authority for either view. An official of the College Board states that high school grades are the best single predictor of college grades, with an average correlation of .54 on a scale of 0 to 1. Notice that this does not confine the predictive power of SAT scores to first year college grades.