Twin studies have found concordance rates of 63% to 87% between identical twins for obsessive-compulsive disorder (OCD). What does this suggest?
a. ?OCD prevalence and behaviors vary by culture.
b. ?OCD has a strong genetic vulnerability.
c. ?OCD is a learned behavior through classical conditioning.
d. ?OCD can be attributed to evolutionary causal factors.
ANSWER:
b
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In what year was the American Psychological Association founded?
a. ?1892 b. ?1932 c. ?1952 d. ?1969 e. ?1979
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