A therapist treating a phobia by gradually pairing relaxation with the feared object is using:

1. Phobia treatment grew out of classical conditioning work. 2. Counterconditioning teaches a new response to a stimulus that elicited undesirable behavior. 3. Two counterconditioning techniques are aversive conditioning and exposure therapy. 4. Joseph Wolpe refined Jones's techniques thirty years later. 5. That refinement gave us systematic desensitization. _Source: OpenStax Psychology 2e (CC BY 4.0), Ch 16 'Therapy and Treatment', sections 16.1-16.4_