Differential Reinforcement of Diminishing Rates DRD is an intervention used to decrease the frequency of a target behavior Reinforcement is delivered when the rate of the target behavior is at or below a predetermined criterion during a specific interval The goal is to gradually reduce the behaviors occurrence In this scenario Matts boss is reinforcing him specifically for greeting customers only once per interaction which is a specific lower rate than his previous tendency to greet them multiple times The intervention directly targets diminishing the rate of greetings to a desired lower frequency DRO Differential Reinforcement of Other Behavior involves reinforcing the absence of the target behavior for a specified period eg reinforcing Matt if he doesnt greet customers at all for 5 minutes DRA Differential Reinforcement of Alternative Behavior involves reinforcing a desirable alternative behavior while withholding reinforcement for the unwanted behavior While greeting once could be considered an alternative to greeting multiple times the primary focus of the intervention as described is on the rate of the greeting behavior itself making DRD a more precise fit DRI Differential Reinforcement of Incompatible Behavior is a subset of DRA where the alternative behavior is physically impossible to perform simultaneously with the unwanted behavior eg reinforcing Matt for holding a menu while he is also greeting if holding the menu prevented multiple greetings