Which of the following is NOT a type of partial reinforcement schedule?

A continuous schedule is not considered a type of partial reinforcement schedule because it involves providing reinforcement every time a desired behavior occurs. In contrast, partial reinforcement schedules involve delivering reinforcement only some of the time when the behavior is demonstrated.

The other schedules—fixed ratio, variable interval, and variable ratio—are all forms of partial reinforcement. Fixed ratio schedules provide reinforcement after a set number of responses, while variable interval schedules offer reinforcement after varying amounts of time, and variable ratio schedules reinforce after an unpredictable number of responses. These methods are differentiated from continuous reinforcement due to their intermittent nature, which can lead to greater persistence of behavior over time.