Jack has been diagnosed with obsessive-compulsive disorder. He has persistent thoughts that are upsetting and engages in ritualistic actions to reduce anxiety. He feels that he has control over his thoughts and actions, but chooses not to stop them. Jack's case is unusual is that OCD patients usually ____

Cal is extremely edgy. He paces around his hotel room and every few minutes ducks over to the window and sneaks a look through the curtains. He is muttering to himself and tugging at his hair

His body feels clammy. His skin is crawling and his heart is pounding. He can't shake the idea that people are waiting for him outside, that maybe soon they'll be coming in to get him. What drug are these symptoms indicative of? a) marijuana b) barbiturates c) amphetamines d) hallucinogens

One research study involving 8- to 16-mont-olds found that for every hour of educational DVDs viewed per day, the DVDs understood _____ words than infants who watched no DVDs

a. 5 to 10 more b. 5 to 10 fewer c. 8 to 16 more d. 8 to 16 fewer