Chemical substances that change people's moods, perceptions, and mental functioning are known as ________ drugs

Disney's cartoons are made up of thousands of still pictures, but we see motion in these cartoons because of

a. motion parallax. b. linear perspective. c. stroboscopic movement. d. the Müller-Lyer illusion.

Which of these individuals is exhibiting a symptom that commonly occurs in substance abuse but is not necessarily one that constitutes part of the diagnostic criteria for substance dependence?

a) John whose symptoms include tolerance b) Larry who has had numerous legal problems c) Mike who engages in a compulsive pattern of use d) Harry who is experiencing withdrawal from a psychoactive substance