Among older males, suicide is most frequent among those who are ______

During the preoperational stage, the child begins to play "make believe," use language, and think about problems. These behaviors indicate the child is capable of

a) egocentrism. b) conservation. c) object permanence. d) symbolic representation.

According to the chapter Tokens Against Aggressionabout the use of a token economy in a psychiatric

hospital, a system in which tokens are earned for desired behavior that can be redeemed for rewards is called a: (a) operant contingency (b) token economy (c) reinforcement contingency (d) goods and exchange system