Robert Sternberg's theory of interpersonal love suggests that there are multiple ________ within any given relationship

The most frequently abused illicit drug in the United States is

a. Marijuana b. Amphetamines c. Cocaine d. Opioids

A motorist takes his car to the garage for a tune-up. Unbeknownst to him, the mechanic tells the motorist that he tuned the car, when in fact he didn't. The motorist feels the car runs better. This illustrates

a. a double bind b. a placebo effect c. desensitization d. delusions of reference