Final answer:
Variable interval reinforcement is a type of reinforcement schedule that provides reinforcement based on varying amounts of time, which are unpredictable. This creates unpredictability and helps to keep the dog motivated.
Step-by-step explanation:
The type of reinforcement described in the question is known as variable interval reinforcement. This type of reinforcement schedule involves providing reinforcement based on varying amounts of time, which are unpredictable.
An example of variable interval reinforcement is a fast-food manager who gives a bonus to employees whenever a quality control person visits the restaurant. Since the manager never knows when the visit will happen, the employees stay motivated to provide prompt service and keep the restaurant clean.
This type of reinforcement creates unpredictability, which keeps the dog motivated to perform the desired behavior.