Individuals' beliefs about why they or others succeed or fail are referred to as ________

Early onset of drug use is associated with

A) increasing use over time. B) greater risk for alcohol disorders. C) greater risk for drug disorders. D) all of the above.

Whose opinion is best supported by the results of twin and adoption studies?

a. Aaron, who assumes heredity is solely responsible for behavioral development. b. Baron, who believes heredity has a substantial, but not total influence on behavioral development. c. Karen, who asserts that heredity has virtually no influence on development. d. Sharon, who asserts that twin and adoption studies are too flawed to yield accurate information about the influence of genetics on development.