2. Whenever Jana’s friend Karla phoned late in the evening, she would invariably begin complaining about her coworkers. In the beginning, Jana listened attentively and provided emotional support. Unfortunately, Karla started phoning more and more often, with each call lasting longer and longer. Jana began to wonder if she was reinforcing Karla’s behavior of phoning and complaining, so she decided to screen her late-evening calls and not answer any such calls from Karla. Eventually, Karla stopped phoning at that time, and they resumed a normal friendship that excluded lengthy complaints over the phone. Jana used the

(procedure/process) of extinction when she stopped answering Karla’s late-evening calls, while the of extinction is the eventual cessation of such calls.