Colleen is conducting a research study where she is in the process of gathering a large number of scientific articles so that she can pool and summarize the data statistically. It appears that Colleen is conducting a

Some people have suggested that oxytocin could act as a "love or cuddle hormone" or "liquid trust." Which of the following is a reason given in the textbook why this is an oversimplification?

a. Oxytocin actually decreases attraction and trust in most people. b. Giving people doses of oxytocin makes them more likely to favor their own group over other groups, and increases defensive aggression against outsiders. c. Oxytocin increases attraction and trust in non-human animals, but has no effect in humans. d. Giving people doses of oxytocin only works if it is administered along with vasopressin.

In a study mentioned in your textbook, a survey of nearly 2,000 people yielded _____ motives for having sex

a. 3 b. 10 c. 28 d. 237