Your friend walks away from you on campus. Despite the fact that the retinal image of your friend ________, your perception of the friend does not change, thanks to ________

Larger and larger doses of amphetamines can lead to a sever mental disturbance and paranoia called _____.

a) amphetamine neurosis b) amphetamine psychosis c) amphetaminism d) amphetamine toxicity

A behaviourist would interpret drive-reduction theory as positing that all reinforcers are:

A) positive. B) negative. C) secondary. D) mediated by expectancies.