Which neurotransmitter is released in the reward pathways in the brain in response to ingestion of several psychotropic drugs?
A. dopamine
B. GABA
C. norepinephrine
D. acetylcholine
Answer: A
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In people suffering from posttraumatic stress disorder, the startle response is ____
a. generally absent b. generally weaker than in other people c. the same as in other people d. generally stronger than in other people
Irene Pepperberg worked with an African gray parrot named Alex. Her research revealed that:
a. Alex was capable of addition, subtraction, multiplication, and division problems, showing an innate understanding of numbers. b. Alex was able to make requests and to answer simple questions about objects. c. Alex's linguistic abilities were limited to the "parroting" of phrases that he heard Irene speak. d. Alex showed no evidence of cognitive abilities, which isn't surprising given his brain was the size of a walnut.
A problem with most correlational studies of mood is use of __________ recall of moods.
a. introspective b. retrospective c. speculative d. serial
What sampling distribution is used to test the null hypothesis for the Pearson correlation coefficient?
a. t distribution with N df b. t distribution with N â 1 df c. t distribution with N â 2 df d. t distribution with N â k df