Beyond Genes and IQ
The fact that Chinese and Japanese Americans have a slightly lower mean IQ than Whites, or at least no higher IQ, and yet outperform them academically and occupationally can be approached in two ways. First, as a discovery with profound implications for ethnic, gender, and national groups. Second, as a phenomenon that both calls out for explanation and poses the more general problem of what factors actually determine the achievements of ethnic groups in America. The implications gradually merge into the causal problem and therefore, we begin with them.
Theories about the genetic superiority of the Sino-Japanese peoples for intelligence are now suspect, no matter what evolutionary scenario is proposed. Japanese in Japan and Chinese in China, although here the evidence is mainly from overseas Chinese, may have a 1- to 5-point advantage in terms of overall IQ over White Americans. But that advantage disappears when all three groups are raised in a more uniform environment, that is, the environment of postwar America.