While behavior modification techniques have been used in the treat-ment of drug addiction most of these applications have involved the use of respondent conditioning techniques. Wolpe (1965) has reported on the successful attempt through the use of a reciprocal inhibition tech-nique to dispel a craving for Demerol (Merperidin HCL) which the client had been addicted to for a 3-year period. The client was instructed in the use of a small portable shock dispenser, and self-administered the evocation of strong shock at any endogenous sign of drug craving.

According to how the "respondent conditioning technique" is described above, what is the stimulus that happens first and what happens next? If this technique follows the standard sequence of events in classical conditioning, what is the unconditioned stimulus (US) and what is the conditioned stimulus (CS) in the "respondent conditioning technique".