This commentary discusses the concept of ''robustness'' as a focal poi
nt in evaluating controversies surrounding The Bell Curve: Intelligenc
e and Class Structure in American Life (Herrnstein and Murray, 1994),
particularly as it applies to the relationship between IQ variation an
d school achievement. Emphasis is placed on distinguishing between the
concepts of reasonableness versus robustness in evaluating alternativ
e explanations for average black/white differences in scholastic achie
vement.