Final answer:
DRE is not a recognized method of differential reinforcement. DRA reinforces alternative behavior, DRO reinforces the absence of undesired behavior over time, and DRI reinforces behavior incompatible with the undesirable one.
Step-by-step explanation:
The method that is NOT a form of differential reinforcement from the options provided is DRE. Differential reinforcement is a technique used in behavior therapy, specifically within the realm of Applied Behavior Analysis (ABA), to increase desired behaviors and decrease undesired behaviors by reinforcing only the target behavior.
- Differential Reinforcement of Alternative behavior (DRA) involves reinforcing a behavior that serves as a viable alternative to the undesired behavior.
- Differential Reinforcement of Other behavior (DRO) involves reinforcing the subject for not engaging in the undesired behavior over a specified period of time.
- Differential Reinforcement of Incompatible behavior (DRI) involves reinforcing a behavior that is incompatible with the undesired behavior.
The letter 'E' in DRE does not correspond to a widely recognized method of differential reinforcement in ABA. Therefore, option B, DRE, is not a method of differential reinforcement.