Which evidence best demonstrates an environmental impact on intelligence?
a. A high correlation between the IQ scores of identical twins
b. A low correlation between the IQ scores of strangers
c. The rapid increase in average WISC scores seen during the past 25 years
d. The stability of WISC scores seen during the past 25 years
c
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Which of the following statements about self-esteem is true?
A) Children who attend schools where their SES is well-represented have fewer self-esteem problems. B) Compared with their Caucasian agemates, African-American children tend to have slightly lower self-esteem. C) Compared with U.S. children, Chinese and Japanese children tend to have slightly higher self-esteem. D) Gender-stereotyped beliefs have little, in any, effect on children's overall self-esteem.
In comparing anorexia nervosa to bulimia nervosa, research shows that
A) anorexia is most common among females and bulimia is most common among males. B) three times as many people suffer from anorexia as suffer from bulimia. C) anorexia usually appears between the ages of 14 and 18, whereas bulimia emerges in later adolescence. D) anorexia is highly linked to genetics, but bulimia rarely runs in families.