Which adolescent is experiencing a change in his primary sex characteristics?
a. Peter, who now has facial hair
b. Saul, who has begun to produce sperm
c. Andrew, who has begun to talk in a deeper voice
d. James, who now has broader shoulders
b
Psychology
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During the fetal stage, the major organ systems of the body begin to form, and sex differentiation occurs.
a. true b. false
Psychology
A key element in the use of social-learning therapy to modify behavior is
a. the observation of models. b. the use of punishment. c. unconditional positive regard. d. contingency management.
Psychology