A researcher implants an electrode in a rat's brain, and then wires the electrode so that it stimulates a specific brain region every time the rat presses a lever
The rat finds the stimulation so rewarding that it does nothing but press the lever all day. Which of the following brain regions does the electrode most likely stimulate?
A) nucleus accumbens
B) amygdala
C) cerebellum
D) thalamus
Answer: A
Rationale: The nucleus accumbens is part of the basil ganglia, and is believed to be involved in pleasurable and rewarding sensations associated with certain behaviors. Researchers have found that rats will continuously self-stimulate the accumbens and related regions by pressing a lever.
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A circus trainer wants to train a cat to pull a rope as part of an animal act. The probability that the cat will just pull a rope is very low. What technique would be the best choice to use to help the cat learn to emit the desired response?
a. shaping b. stimulus generalization c. extinction d. stimulus discrimination
Which of the following is one of the eight recommended criteria for evaluating validity coefficients?
a. Determine the statistical sophistication of the researchers who conducted the validation. b. Do not confuse the criterion with the predictor. c. Make sure the results obtained from the validity study are situation specific. d. Perform a small-scale validation study with the population of interest to you.
When a child says, "Me cookie" the child is demonstrating:
a. overregulation c. telegraphic speech b. overspecification d. concrete speech
Antisocial personality disorder is rooted in a personality trait marked by unfounded anxiety, tension, and emotionally instability.
a. True
b. False
Indicate whether the statement is true or false