By the age of 15, some ________ of teenage girls report that they have masturbated

What is Joseph Wolpe's most noted contribution to psychology?

a. Systematic desensitization as a means of therapy b. The discovery that fear can be repressed through familiarity with the feared object c. The definition of operant conditioning d. The discovery of the mechanism of the extinction process

In a classic study, psychologists were admitted to a psychiatric hospital with a false diagnosis of schizophrenia

They behaved in normal ways, but the staff saw their behavior as signs of schizophrenia. This study illustrates the power of _____ a) false perception. b) psychologists' acting ability. c) a perceptual set. d) ignorance.