The changes in pressure caused when molecules of air or fluid collide with one another then move apart again are called __________

Aversive conditioning

a. is a type of behavior therapy. b. is no longer used by therapists. c. is designed so that the person receives unpleasant consequences for undesired behavior. d. both a and c

In one study of 105 Vietnam War veterans with chronic PTSD, the subjects were asked to keep a sleep diary over the course of six weeks. According to your text, the researchers found that shorter duration of sleep was correlated with

A. degree of post-service adjustment. B. length of service in Vietnam. C. severity of PTSD. D. depth of co-morbid depression.