After a painful experience at one dentist’s office, Teresa’s mother takes Teresa to a different dentist, who takes great care to make her visits painless. Teresa is anxious at first, but after a few visits, Teresa gradually becomes less resistant about going to the new dentist. Teresa’s change in behavior can probably best be explained in terms of _____. But, Teresa doesn’t go to see the dentist again until three years later. On her first visit to the painless dentist after that time interval, she is anxious once again, even though she had not been anxious in her previous visits. The return of this response after it had previously disappeared is known as _____.
