Final answer:
The student's nausea and vomiting in the waiting room prior to chemotherapy treatment is an example of classical conditioning.
Step-by-step explanation:
The student is experiencing a conditioned response (CR) in the form of nausea and vomiting in the waiting room prior to chemotherapy treatment. This reaction is an example of classical conditioning.
In classical conditioning, a neutral stimulus (the doctor's office and waiting room) becomes associated with an unconditioned stimulus (the chemotherapy drugs) that naturally elicits an unconditioned response (nausea and vomiting). Over time, the neutral stimulus becomes a conditioned stimulus that triggers a conditioned response (nausea and vomiting) even without the presence of the unconditioned stimulus.