Changing drug choice through conditioned reinforcement: comment on Alessi, Roll, Reilly, and Johanson (2002)

The study by S. M. Alessi, J. M. Roll, M. P. Reilly, and C.-E. Johanson (2002) showed that in human volunteers a choice of placebo over diazepam could be reversed by pairing the drug with a higher monetary reward and the placebo with a lower monetary reward for performance on a computer-based task. The results provide a clear laboratory model of how initially neutral or aversive effects of a drug can be altered by association with positive reinforcement to establish the drug as a conditioned reinforcer and to generate drug-seeking behavior. Parallels from the animal and human literatures are discussed, as are potential future studies and applications of this approach for preventing and reducing drug abuse in humans.