One of the most convincing demonstrations that I.Q. is
related to "real life" indicators of ability was provided in
a classic study by Terman and his associates at Stanford
University. . . . Terman found that for the most part
these high-I.Q. children in later adulthood markedly ex-
celled the general population on every indicator of achieve-
ment that was examined: a higher level of education com-
pleted; more scholastic honors and awards; higher occupa-
tional status; higher income; production of more articles,
books, patents and other signs of creativity; more entries
in Who's Who; a lower mortality rate; better physical and
mental health; and a lower divorce rate. . . . Findings such
as these establish beyond a doubt that I.Q. tests measure
characteristics that are obviously of considerable importance
in our present technological society. To say that the kind
of ability measured by intelligence tests is irrelevant or
unimportant would be tantamount to repudiating civiliza-
tion as we know it [p. 9],