Word: herrnsteins
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...article entitled "I.Q.", Richard J. Herrnstein, former chairman of the Psychology Department, says that the trend in society toward the dissolution of artificial social and legal barriers will lead to the creation of biological barriers which will be almost impossible to break down...
...Herrnstein uses the figures to deal with the relative importance of nature vs. nature in I.Q. He argues that since the genes of identical in their I.Q. test scores will be due to the environments...
Comparing the variation of I.Q.'s in this sample of 122 sets of identical twins, Herrnstein (through Jensen) finds that "more than four times out of five the difference between identical twins raised apart fell short of the average difference between fraternal twins raised together by their own parents...
Based on these and other data Herrnstein says that Jensen and most other experts in the field agree that inheritance counts for about 80 per cent of an individual's I.Q., and all other factors around 20 per cent, including education, nutrition...
Unsettled Controversy. Response to Herrnstein's conclusions may well be conditioned by what have been called the "cultural determinants of scientific thought"-the idea that men look for scientific ways to make their social and political beliefs respectable. In the U.S., for example, the emphasis on environment as a significant factor in determining intelligence has surely been influenced by the concept that all men are created equal and the liberal belief in social mobility. On the other hand, 19th century Europeans* generally believed in the crucial importance of heredity because that belief seemed to justify the aristocracy...