Which of the following is NOT a type of intermittent reinforcement?

Continuous Ratio (CR) is the correct answer because it refers to a schedule of reinforcement where every instance of the desired behavior is reinforced. This means that reinforcement occurs continuously and consistently, rather than intermittently. In contrast, the other types of reinforcement schedules—Fixed Ratio, Variable Ratio, and Variable Interval—are all forms of intermittent reinforcement where reinforcement is not provided after every behavior.

Fixed Ratio schedules provide reinforcement after a specific number of responses, Variable Ratio schedules offer reinforcement after an unpredictable number of responses, and Variable Interval schedules reinforce behaviors after varying amounts of time have passed. These intermittent schedules are characterized by their unpredictable nature, leading to various patterns of behavior, while continuous reinforcement creates a steady, predictable process that can often lead to rapid learning of the behavior.