According to information-processing theory, math process must be explicitly taught rather than "discovered" by children

Adoption studies provide a rich setting for discriminating between the contributions of genetics and environment on behavior. In such a study, which of the following would indicate an environmental influence on behavior?

A) An adoptive parent selects a child to adopt who is similar in temperament. B) An adopted child is more similar in behavior to a biological parent than to an adoptive parent. C) The adopted child and the adoptive parent are similar in a behavioral trait. D) An adoptee in a selective placement is similar in behavior to the adoptive parent.

Volunteers who are allowed to sleep without interruption after several nights of REM deprivation tend to get

A) almost no REM sleep. B) less REM sleep than usual. C) their normal amount of REM sleep. D) significantly more REM sleep than usual. E) sleep that consists entirely of REM sleep for several nights.