Which of the following sex hormones brings on physical changes in females at puberty, such as breast development and the onset of menstruation?
a. estrogens
b. progesterone
c. testosterone
d. androgen
Answer: a
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At the National Zoological Park in Washington, D. C., a polar bear suffered a broken tooth and keepers needed a safe way of treating the problem. The bear was rewarded first for sticking its nose through a slot in the cage door,
then for allowing a keeper to lift its lip and touch its teeth. Finally, a veterinarian was able to treat the damaged tooth while the bear waited placidly for its familiar reward. This is an example of ________. a. negative reinforcement b. secondary learning c. desensitization d. shaping
When you enter a darkened room
(e.g., a movie theater), you will find it hard to see at first, but shortly afterward you will be able to see much better. This phenomenon is referred to as: a) color adaptation. b) cone adaptation. c) dark adaptation. d) light adaptation.
Which of the following is true of posttraumatic stress disorder (PTSD)?
A. It can be caused by negative as well as positive events. B. It occurs suddenly and typically affects many people simultaneously. C. It is caused by the minor irritations of life that we all face time and time again. D. It can be triggered by an otherwise innocent stimulus.
A television interviewer who mentally tries out several lines of
questioning before actually beginning a live interview is exhibiting the reflective process called a. intrinsic encoding. b. planning. c. procedural memory. d. the semantic differential.