In an experiment to test the effects of a new flu drug, two groups are used. One group is given the drug, the other group is given a placebo. The group that receives the placebo is called the group

Watson, the founder of behaviorism, suggested that psychologists concentrate on studying

a) unseen mental processes. b) overt behavior. c) unconscious forces. d) covert responses.

A disorder in which intruding thoughts that occur again and again are followed by repetitive, ritualistic behavior meant to lower the anxiety caused by the thoughts is called ____________ disorder

a) obsessive-compulsive b) delusional c) post-traumatic stress d) passive-aggressive