Final answer:
The three variations of basic INT schedules of Reinforcement Plus (R+) are DRO (Differential Reinforcement of Other Behavior), DRI (Differential Reinforcement of Incompatible Behavior), and DRL (Differential Reinforcement of Low Rates of Behavior).
Step-by-step explanation:
The correct answer to the question "Identify the three variations of basic INT schedules of Reinforcement Plus (R+)" is Option C) DRO, DRI, DRL. These variations of intermittent reinforcement schedules are used to modify behavior in operant conditioning. DRO (Differential Reinforcement of Other Behavior) involves providing reinforcement only if a particular behavior has not occurred in a specified amount of time. DRI (Differential Reinforcement of Incompatible Behavior) provides reinforcement for a behavior that is incompatible with the unwanted behavior. Lastly, DRL (Differential Reinforcement of Low Rates of Behavior) is used to provide reinforcement only if the behavior occurs at or below a predetermined rate.