Which of the following is NOT a way in which evolutionary theory explains prosocial behavior?

Maria and Juan go to a therapist because they consistently have difficulty accomplishing intercourse. The therapist recommends a procedure called sensate focus, which means that Maria and Juan will be asked to

a. explore their painful emotions in therapy. b. spend time together relaxing and holding hands. c. go to a physician, to rule out medical problems. d. attempt to have intercourse every night for a week.

What mood disorder is characterized by alterations between periods of extremely high levels and extremely low levels of activity?

A) Bipolar disorder B) Major depressive disorder C) A manic episode D) Seasonal affective disorder