What causes the undifferentiated (or indifferent) gonads to become the testes?
A. Müllerian-determining factor
B. a protein made from the SRY gene
C. ovarian-inhibiting substance
D. a neurotransmitter released from the inactive X in an XX-fertilized ovum
Answer: B
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Following an initial extinction session, then a rest period in his home cage, Sniffy is returned to the chamber for another extinction session. At the beginning of this second session, the rate of bar pressing will be
a. intermediate between what it was prior to the first extinction session and what it was at the end of the first extinction session. b. greater than it was prior to the first extinction session. c. the same as it was at the end of the first extinction session. d. the same as it was at the beginning of the first extinction session.
Which factor best describes the Flynn effect?
a. Changes in genes underlie changes in intellect. b. Most psychologists now accept the theory of "general mental ability.". c. Average IQ scores in the United States have risen dramatically over the past decades. d. Studies of adopted children have demonstrated a significant difference in IQ scores between infant males and infant females.
Comparative social psychology is most often used to explore the important question of why stereotypes exist and persist.
Answer the following statement true (T) or false (F)
It is Halloween night. The trick-or-treaters know that if the porch light is on at a house, they will get candy if they knock on the door and say "Trick-or-Treat.". If the light is off, they know that there will be no reward waiting for them. The trick-or- treaters' behavior is determined by the date (Halloween night) and if a light is on or off. This illustrates the operant principle of
a. shaping. b. stimulus control. c. time-out. d. reciprocal inhibition.