Figure 13.2: Correlations between ratings of physical attractiveness and IQ and perceived intelligence at five different points in the life span The high correlations between attractiveness and perceived intelligence reflect the attractiveness bias. The lower correlations between physical attractiveness and IQ show that the connection is not nearly as strong as people think, although physical attractiveness may account for about 4 percent of the individual differences in IQ.
(Based on data in Zebrowitz et al., 2002.)