Final answer:
All of the following stimuli could serve as effective conditional stimuli for conditioned drug tolerance: thoughts about the drug, the environment in which the drug is administered, and the early effects of the drug.
Step-by-step explanation:
The conditioned stimulus (CS) in conditioned drug tolerance is a stimulus that becomes associated with the effects of the drug, and can elicit a conditioned response (CR) similar to the drug's effects. In this case, all of the following stimuli could serve as effective conditional stimuli for conditioned drug tolerance:
- Thoughts about the drug: When a person thinks about taking the drug, their body may start to respond as if the drug is present, leading to a conditioned tolerance response.
- The environment in which the drug is administered: If a person consistently takes the drug in a specific environment, their body may start to associate that environment with the drug's effects, leading to a conditioned tolerance response when in that environment.
- The early effects of the drug: If a person consistently experiences certain early effects of the drug, such as drowsiness or relaxation, their body may start to associate those effects with the drug's effects, leading to a conditioned tolerance response.
Therefore, the correct answer is d) all of the above.