Final answer:
Dr. Rodriguez does not learn to sweat at the smell of the gloves because there is no conditioned stimulus associated with the smell.
Step-by-step explanation:
Dr. Rodriguez does not learn to sweat at the smell of the gloves because of the absence of a conditioned stimulus (CS) that is associated with the smell. Conditioning is a process in which a neutral stimulus (NS) becomes associated with an unconditioned stimulus (US), leading to a conditioned response (CR). In this case, the smell of the gloves is the NS, sweating is the CR, but there is no CS that has been paired with the smell to elicit the response of sweating. Therefore, Dr. Rodriguez does not learn to sweat at the smell of the gloves.