___________ studies allow behavioral pharmacologists to classify experimental drugs according to their subjective effects even before they have been administered to people.
a. drug discrimination
b. conflict paradigm
c. placebo control
d. classical conditioning
Question 2
Drug self-administration studies indicate that __________.
a. animals may actually prefer the drug experience
b. reinforcers are more effective when there is some delay between them and the behavior
c. the psychiatric drugs chlorpromazine and imipramine are high in reinforcement value
d. all of these
e. none of these