Question

a therapist indicates that a client no longer has to record his daily activities if he can maintain a sober lifestyle. this is an example of
positive reinforcement
negative reinforcement
extinction
punishment

Explanation:

Negative reinforcement involves removing an aversive or unwanted stimulus to increase the likelihood of a behavior (maintaining sober lifestyle here, by removing the daily activity recording task). Positive reinforcement adds a reward, extinction is reducing behavior by removing reinforcement, and punishment decreases behavior via aversive stimuli. So this is negative reinforcement.

Answer:

negative reinforcement