One major grouping of hallucinogens typically allows the user to remain in some touch with the real world and to remember much of what he or she experienced. This group of drugs was referred to as the

It is estimated that by the middle of the current century approximately _______ Americans will have a cultural heritage that is not European

a) 10% b) 20% c) 50% d) 85%

An expanded definition of the traumatic event that triggers PTSD has been proposed. The use of expanded criteria to define trauma has led epidemiologists to estimate that ____ of adults could meet the standard for experiencing a traumatic event

A) almost 90 percent B) over 90 percent C) below 12 percent D) 50 percent