Someone who exhibits ______ behaves and expresses feelings in the same way in various contexts.

Psychological, cultural, and social factors influence _____

a. drug abuse and addiction b. the legalization of certain drugs c. increased use of drugs d. decreased use of drugs

The ________ of a study refers to the degree to which the IV was the only reason for changes on

the DV, i.e., were there extraneous or nuisance variables that disrupted the IV-DV relationship. A) external validity B) diffusion of treatment C) randomization D) internal validity