The results of studies investigating the role of biological factors suggest that depression is caused by
A) variations in the serotonin transporter gene.
B) increases in polypeptide Y in the brain.
C) decreases in the levels of gastric ghrelin.
D) unusual elevations in both dopamine and glutamate levels.
Answer: A
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In his early adulthood, Skinner discovered a new identity by:
a. beginning the cognitive revolution. b. forming the basis of his approach in literature. c. deciding he would study human behavior by scientific methods. d. resolving to become an accomplished writer of non-fiction.
How does the sleep of an average adult change across the night?
a) REM periods increase in length. b) Stage 2 sleep drops out completely. c) The amount of Stage 4 sleep increases. d) There are more alpha brain waves each hour.
When Sam went looking for a new car, he met a beautiful saleswoman who described the curves of the car and how good Sam would look driving it. She did not mention the poor gas mileage, high price, or poor road performance. Sam made a snap decision to buy the car from the persuasive saleswoman. In this example, Sam was likely persuaded through the
a. central route. b. peripheral route. c. direct route. d. evidence-based route.
Which of the following is true of the parental investment theory?
A. Parental prohibition against sexual activity actually increases the likelihood of early sexual behavior. B. Men are eager to engage in casual sex to impress rivals with their sexual prowess. C. Women are reluctant to engage in casual sex for fear of pregnancy. D. Sexual orientation exists on a continuum from exclusively heterosexual to exclusively homosexual.