When babies are mildly distressed they produce a "warm-up" cry known as _____

What is an essential element of the diagnosis of obsessive-compulsive disorder?

a. The obsessions develop in response to the compulsions. b. The person engages in compulsions, which increases anxiety. c. The person's sleep is disrupted by nightmares. d. The person tries to ignore, suppress, or neutralize the unwanted thoughts or impulses.

Research on sleep and dreams indicates that:

a. older adults sleep more than young adults. b. when people dream of performing some activity, their limbs often move in concert with the dream. c. sleepwalkers are acting out their dreams. d. the circadian rhythm has no influence on our patterns of sleep. e. none of the above is true.