Differential reinforcement

“Differential” means reinforcement differs

The plan specifies which response or condition contacts reinforcement, which comparison receives a different schedule or outcome, and what future change is expected. Reinforcement is defined by a measured strengthening or maintenance effect, not by the clinician's intention or the item delivered.

The Association for Behavior Analysis International basic-principles page includes reinforcement in higher-education content. It is not a clinical protocol.

The common abbreviations answer different questions

• DRA, alternative response: reinforces a defined useful response as an alternative.
• DRI, incompatible response: reinforces a response that cannot occur at the same time as the comparison response.
• DRO, other behavior: delivers reinforcement when the specified response has not occurred during a defined interval or moment.
• DRL, low rates: reinforces a lower rate or spacing when some amount of the response remains acceptable.

Each arrangement needs an operational definition, eligible opportunities or intervals, schedule, outcome, prompt plan, and review rule. The acronym alone says little about quality.

Choose the comparison carefully

The comparison determines what the measure can show. DRA works best when the alternative is accessible and produces an outcome that matters in the relevant moment. DRI requires genuine incompatibility rather than two responses that merely compete. DRO can document intervals without a specified response, but it may leave the person without a useful alternative. DRL fits a response that remains acceptable at a lower rate; it is a poor fit when every occurrence creates serious risk.

Define how reinforcement remains available for the desired response and what partners do when the comparison response occurs. Avoid long intervals that make success unlikely. Review whether the schedule teaches a practical skill, preserves communication, and avoids accidental reinforcement of another harmful or burdensome pattern.

Start with a meaningful outcome

Ask what the person wants more of and which barrier the plan addresses. An alternative response should be efficient, reliable, and available in the real moment. Requiring a long sentence, eye contact, or a precise motor response can make an alternative harder than the action it is meant to replace.

Assessment should consider communication, pain, sleep, medication, sensory conditions, task difficulty, environment, learning history, and the actions of communication partners. Seek medical or interdisciplinary evaluation when relevant.

Reinforcement must fit the person

Offer choices and update them as preferences change. Direct communication leads the assessment. A preferred item is only a possible reinforcer until data show that the consequence strengthens or maintains the defined response under the relevant conditions.

Protect relationships, shared enjoyment, rest, play, and unstructured choice. Do not make every valued event contingent on performance. Food, water, bathroom access, mobility, prescribed care, communication, AAC, pain support, and emergency help remain available.

Preserve assent and communication

ASHA's AAC guidance says AAC users should always have their tools or devices. Accept effective speech, sign, gesture, writing, movement, and aided AAC.

Provide an accessible way to accept, decline, pause, or change the arrangement. Representative consent is not the person's assent. Pause and reassess on withdrawal or distress unless an immediate safety or legal duty controls.

A fictional DRA example

Theo chooses a goal of getting a quiet break during a community art group. The team defines eight eligible opportunities as moments when Theo shows the agreed early signal and a break is safely available. An independent break request can use speech, a card, or AAC before a prompt.

Theo requests independently in 5 of 8 opportunities. Partners honor the recognizable request within 10 seconds in 4 of 5. Report both denominators. One delayed partner response remains a system gap. These observations do not establish that differential reinforcement caused the requests.

Prompts and schedules need a transfer plan

Teach communication partners to notice the response and deliver the agreed outcome. Fade prompts without removing useful supports. Thin or change reinforcement only when the person still succeeds and the arrangement remains worthwhile.

Natural outcomes may eventually support the response. A request for help should reliably produce help or a clear answer. A break request should remain useful after formal teaching ends.

Measure benefits and side effects

Define opportunities, responses, partner action, prompts, exclusions, and time windows. Measure the desired response, comparison response, latency, safety, distress, access, partner fidelity, generalization, maintenance, and the person's experience.

A review of differential reinforcement during early skill acquisition summarizes a narrow research area and identifies questions for further study. It cannot select a procedure for an individual.

The current BACB Ethics Code requires covered professionals to involve clients and stakeholders, obtain consent and assent when applicable, base intervention on assessment, prioritize positive reinforcement, minimize risk, and evaluate continuously.