At times of stress, the anterior pituitary communicates with the adrenal glands using

a. cortisol

In a study by Carré and colleagues, men played a computer game against a fictitious opponent. Researchers varied the rewards and costs as well as provocation from the opponent. Results supported the idea that

A) testosterone levels will vary depending on situational factors. B) men who produce high levels of testosterone are more aggressive. C) testosterone levels are non-responsive to situational factors. D) aggression-levels vary as a response to situational factors rather than testosterone levels. E) aggression depends on serotonin levels to a greater extent than testosterone levels.

Intergroup conflict between two groups of boys at summer camp was most effectively reduced by

a. intense athletic competition. b. meetings between group leaders. c. having the two groups share meals together. d. emergencies that required the cooperation of both groups.