Final answer:
Lewis Terman's study on gifted children showed they were well-adjusted, successful adults, debunking the myth of high intelligence being associated with maladjustment and physical weakness.
Step-by-step explanation:
One of the major conclusions from Lewis Terman's study on intellectually gifted children, which began in 1921, was that these children did not conform to the popular myth of being maladjusted. In fact, Terman found that gifted children tended to become well-educated and successful adults who were also well-adjusted. Moreover, his research showed that gifted individuals were above average in terms of physical health and attractiveness, challenging the stereotype of highly intelligent people being physically weaker or less appealing.