The cluster approach to categorizing personality disorders is based on:

All of the following are associated with the diagnosis of posttraumatic stress disorder EXCEPT:

A. Intrusion symptoms (e.g., memories, dreams). B. Symptoms for < 1 month. C. Negative changes in thoughts or mood (e.g., negative beliefs about oneself; feeling detached). D. Alterations in arousal (e.g., angry outbursts, hypervigilance).

A student takes a drug that distorts perception. He holds up his hand right in front of his face. Horrified he yells, "I have a giant hand!" Most likely the drug interfered with __________

a) size constancy. b) shape constancy. c) brightness constancy. d) color constancy.