module 66: anxiety disorders, obsessive-compulsive disorder, and posttraumatic stress disorder (pg. 661-670) objective: identify different anxiety disorders (p. 661) anxiety disorders: psychological disorders characterized by distressing persistent anxiety or maladaptive behaviors that reduce anxiety generalized anxiety disorder (gad): in which a person is continually tense, apprehensive, and in a state fo autonomic nervous system arousal what does it mean that the anxiety of gad is free-floating? panic disorder: an anxiety disorder marked by unpredictable, minutes-long episodes of intense dread in which a person experiences terror and accompanying chest pain, choking, or other frightening sensations. often followed by worry over a possible next attack