Differential Reinforcement of Incompatible DRI and Differential Reinforcement of Alternative DRA behaviors are powerful behaviorchange procedures because they teach and strengthen a replacement behavior while simultaneously decreasing the problem behavior A fundamental prerequisite for both DRI and DRA is that the replacement behavior must already be in the clients repertoire This means the client must be able to perform the desired alternative or incompatible behavior The goal of DRIDRA is to reinforce this existing behavior not to teach a new skill from scratch If the replacement behavior is not in the repertoire other teaching strategies like shaping modeling or prompting would be needed first to establish the skill Option A describes a common ethical consideration for implementing punishment procedures not differential reinforcement Option C describes Differential Reinforcement of Other DRO behavior where reinforcement is delivered when the problem behavior has not occurred for a specified period without necessarily requiring an alternative behavior Option D while functional communication training is a common application of DRA the ability to functionally communicate is not a universal prerequisite for all DRIDRA procedures any alternative behavior in the repertoire can be targeted