In a sequential design, time of measurement is confounded with cohort effects

The restorative theory views sleep as

a. having evolutionary advantages. b. helping the body repair the wear and tear of the day's events. c. a means to cope with stress. d. important only to the extent that we don't enter a state of sleep deprivation. e. helping us to restore our unconscious store of impulses.

Which of the following is NOT one of the four types of problems associated with depression that interpersonal therapy (IPT) can help with?

a) deficits in interpersonal skills b) chemical imbalances c) interpersonal role disputes d) severe response to the death of a loved one