An animal trainer is teaching a miniature poodle to balance on a ball. Initially, he gives the poodle a treat for approaching the ball, then only for placing its front paws on the ball, and finally only for climbing on the ball. The trainer is using the method of
A) successive approximations.
B) delayed reinforcement.
C) classical conditioning.
D) secondary reinforcement.
Answer: A) successive approximations.
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Rats repeatedly had food for 12 hours, followed by a very sweet diet. On a day when the rats had no access to the sweet diet, what did they do? a. They showed intermittent bursts of activity resembling attention deficit/hyperactivity disorder. b. They stared into the distance as if they were hallucinating
c. They showed symptoms resembling major depression. d. They showed symptoms resembling morphine withdrawal.
When two ova are released and both are fertilized by a sperm, what type of twins result?
a. Fraternal twins b. Identical twins c. Either fraternal or identical twins d. Neither, only one egg at a time can be fertilized and twins result if that egg splits in two.
Research evidence indicates that two biological factors are most likely to influence a
person's sexual orientation. These are a. postnatal hormonal exposure and differences in brain structure. b. prenatal exposure to androgens and differences in genital development. c. differences in brain and genital development. d. prenatal hormonal exposure and heredity. e. heredity and brain development.
With young children, _____ percent of parent–child interactions involve the parent telling the child not to do something
A) 45% B) 55% C) 65% D) 75%