Final answer:
Bob Boss is using fixed ratio reinforcement by providing a monetary reward of $5 for each phone call made by his telemarketers, which encourages repetitive behavior and increased productivity.
Step-by-step explanation:
Bob Boss is using a form of operant conditioning called fixed ratio reinforcement. In this context, the reinforcement is a monetary reward given after a predictable number of responses; specifically, $5 is given for each phone call made by a telemarketer. This method is known to stimulate repetitive actions, as the reward is given based on the quantity of the responses rather than their quality. In this scenario, Bob's telemarketers are encouraged to make more phone calls to earn additional rewards, aligning with the principles of behaviorism and operant conditioning as proposed by B.F. Skinner.