Differential Reinforcement of Incompatible Behavior (DRI) is a powerful behavior reduction procedure that teaches clients to engage in appropriate behaviors that physically cannot occur at the same time as problem behaviors. This approach is particularly valuable because it focuses on building adaptive skills rather than simply suppressing unwanted behavior. Understanding DRI is essential for both clinical practice and BCBA exam preparation, as it represents a key component of differential reinforcement strategies.
Table of Contents
- DRI in ABA: What is Differential Reinforcement of Incompatible Behavior (DRI)?
- DRI in Action: Applied Examples with ABC Data
- DRI on the BCBA Exam: Key Distinctions and Common Traps
- Implementing DRI Effectively: A Practitioner’s Checklist
- Summary and Key Takeaways
DRI in ABA: What is Differential Reinforcement of Incompatible Behavior (DRI)?
DRI involves reinforcing a specific alternative behavior that is physically impossible to perform simultaneously with the target problem behavior. The procedure systematically increases the incompatible behavior while placing the problem behavior on extinction or reducing its reinforcement.
This approach differs from other reinforcement procedures through its focus on topographical incompatibility. The selected behavior must be physically impossible to perform at the same time as the problem behavior.
The Core Mechanism: Incompatibility
The defining feature of DRI is physical impossibility of co-occurrence. When a client engages in the reinforced incompatible behavior, they simply cannot perform the problem behavior due to body position or movement constraints.
Consider these simple examples:
- Sitting versus running – A child cannot sit in a chair and run around the room simultaneously
- Hands on table versus hand flapping – Hands placed flat on a table cannot simultaneously engage in flapping motions
- Quiet mouth versus vocal stereotypy – A closed, quiet mouth cannot produce loud humming sounds
This physical constraint is what distinguishes DRI from other differential reinforcement procedures like DRA (Differential Reinforcement of Alternative Behavior).
DRI in Action: Applied Examples with ABC Data
Real-world application of DRI requires careful functional assessment and strategic selection of incompatible behaviors. These examples demonstrate how to implement DRI effectively in clinical settings.
Example 1: Reducing Hand Flapping During Seat Work
Scenario: A 7-year-old student engages in frequent hand flapping during independent seat work activities. Functional assessment suggests the behavior serves an automatic reinforcement function related to sensory stimulation.
ABC Analysis:
- Antecedent: Independent worksheet tasks at desk
- Behavior: Rapid hand flapping at shoulder height
- Consequence: Sensory stimulation (automatic reinforcement)
DRI Intervention: Reinforce hands-down-on-table position or manipulating a fidget toy. Both behaviors are physically incompatible with hand flapping.
Implementation: Provide social praise and token reinforcement for maintaining hands on table or appropriate fidget use. Initially use continuous reinforcement, then thin to intermittent schedules.
Example 2: Replacing Vocal Stereotypy in a Group Setting
Scenario: A teenager engages in loud humming during group instruction sessions. Assessment indicates the behavior serves a sensory function and occurs most frequently during passive listening periods.
ABC Analysis:
- Antecedent: Teacher lecture, minimal student participation
- Behavior: Sustained humming at conversational volume
- Consequence: Auditory self-stimulation (automatic reinforcement)
DRI Intervention: Reinforce quiet mouth closure or appropriate vocal responses when called upon. These behaviors are topographically incompatible with humming.
Implementation: Use differential reinforcement of quiet mouth during instruction, with periodic opportunities for appropriate vocal responses. This approach contrasts with DRA procedures that might reinforce any quiet behavior.
DRI on the BCBA Exam: Key Distinctions and Common Traps
BCBA exam questions frequently test candidates’ ability to distinguish DRI from other differential reinforcement procedures. Understanding these distinctions is crucial for exam success and effective clinical decision-making.
DRI vs. DRA: The Critical Difference
The fundamental distinction lies in the relationship between behaviors:
- DRI requires physical incompatibility – The alternative behavior cannot occur simultaneously with the problem behavior
- DRA requires functional equivalence – The alternative behavior serves the same function but may co-occur
Consider this exam-style scenario: A child screams for attention. Teaching them to raise their hand quietly would be DRA (functionally equivalent). Teaching them to keep their mouth closed would be DRI (physically incompatible).
Exam Pitfalls to Avoid
Candidates frequently make these errors when identifying DRI procedures:
- Confusing incompatibility with alternatives – Assuming any alternative behavior qualifies as DRI
- Overlooking extinction component – Forgetting that problem behavior reinforcement must be withheld
- Selecting incompatible behaviors without functional assessment – Choosing behaviors that don’t address the maintaining variable
- Misapplying to low-probability behaviors – Confusing DRI with procedures targeting behaviors that are merely unlikely to co-occur
For more on distinguishing reinforcement procedures, see our guide on differential reinforcement strategies.
Implementing DRI Effectively: A Practitioner’s Checklist
Successful DRI implementation requires systematic planning and execution. Follow this step-by-step checklist to ensure procedural integrity and effectiveness.
- Conduct functional assessment – Identify the maintaining variables for the problem behavior
- Select truly incompatible behaviors – Verify physical impossibility of co-occurrence
- Establish baseline data – Measure both problem and incompatible behaviors
- Program reinforcement systematically – Use appropriate schedules and potent reinforcers
- Implement extinction concurrently – Withhold reinforcement for problem behavior
- Monitor procedural integrity – Ensure consistent implementation across settings
- Collect ongoing data – Track both behavior reduction and skill acquisition
- Program for generalization – Teach the incompatible behavior across relevant contexts
Remember that treatment integrity and social validity are essential components of effective intervention, as discussed in our treatment integrity guide.
Summary and Key Takeaways
Differential Reinforcement of Incompatible Behavior represents a positive approach to behavior reduction that emphasizes skill building. Key points to remember include:
- DRI requires physical impossibility of simultaneous performance
- The procedure combines reinforcement of incompatible behaviors with extinction of problem behaviors
- Effective implementation depends on thorough functional assessment
- BCBA exam questions frequently test distinctions between DRI and DRA
- Procedural integrity is essential for intervention effectiveness
For authoritative information on behavior analytic procedures, consult the Behavior Analyst Certification Board resources and peer-reviewed literature on differential reinforcement strategies.
