What Is a Conditioned Reinforcer in ABA Therapy?
A conditioned reinforcer (sometimes called a secondary reinforcer) is a stimulus that didn’t start out as motivating but became reinforcing through repeated pairing with something the learner already finds reinforcing. In Applied Behavior Analysis (ABA), conditioned reinforcers are how everyday stimuli like praise, tokens, stickers, or a thumbs up come to influence behavior—none of them are inherently rewarding, but each one acquires reinforcing power through learning history. The underlying mechanism comes from operant conditioning, the core of behaviorism.
Conditioned reinforcers stand in contrast to unconditioned (or primary) reinforcers, which are reinforcing without any prior learning—food when a learner is hungry, water when they’re thirsty, warmth when they’re cold. Primary reinforcers tap into biological needs; conditioned reinforcers gain their power through experience. “Good job!” doesn’t mean anything to a newborn, but after years of being paired with attention, smiles, and access to preferred activities, it becomes a powerful motivator for most children.
Conditioned reinforcers can be built deliberately. A behavior technician working with a young learner who doesn’t yet respond to praise will pair verbal praise with a primary reinforcer the learner already values—maybe a small piece of a favorite snack or access to a preferred toy. Over many pairings, the praise itself takes on reinforcing properties and can stand on its own. A 2010 review published in the Journal of the Experimental Analysis of Behavior on PubMed Central describes how stimuli associated with primary reinforcers appear to acquire the capacity to strengthen behavior.
Conditioned reinforcers come in a few common forms in ABA practice: social reinforcers like praise, smiles, or high-fives; tokens that can be exchanged for a backup reinforcer; visual indicators like a checkmark on a chart; and access to a preferred activity. The behavior analyst chooses which kind to build based on the learner’s current motivators, their developmental level, and the goals of the program.
Support for Your Child’s Growth
Learn more about our ABA services and how we can help your child reach their full potential.
Examples of Conditioned Reinforcers in ABA Therapy
Example 1: Building social praise as a reinforcer
A behavior technician begins working with a four-year-old client who shows little response to verbal praise. The behavior analyst designs a pairing protocol: each time the learner completes a target response, the behavior technician says “Great job!” in a warm, animated tone, and immediately delivers a small piece of the learner’s favorite snack. After several weeks of consistent pairings across sessions, the team observes that the learner begins to smile, make eye contact, and continue engaging when they hear “Great job!”—even before the snack arrives. Praise has become a conditioned reinforcer for this learner. This kind of pairing happens most naturally in the context of natural environment teaching, where everyday interactions provide ongoing opportunities to build new reinforcers.
Example 2: Tokens as conditioned reinforcers
In a token economy, a behavior technician hands the learner a small token (a sticker, a star, a checkmark) each time they complete a target behavior. The token itself has no intrinsic value, but the learner knows that five tokens can be exchanged for ten minutes of preferred screen time. Through the consistent pairing of tokens with the backup reinforcer (screen time), the tokens themselves come to function as conditioned reinforcers. The therapist can hand over a token in the moment, mark a clear connection between behavior and consequence, and still bridge the gap to the larger reward.
Example 3: A checkmark on a visual schedule
A behavior technician working with a seven-year-old client uses a visual schedule for the session: each completed task gets a checkmark on the chart. At first, the checkmarks don’t mean much to the learner. But the behavior technician consistently pairs each checkmark with a brief celebration, immediate praise, and the next preferred activity. Over time, the checkmark itself becomes a conditioned reinforcer—the learner looks forward to checking each task off, and the visual progression serves as its own source of motivation through the session.
Start a Meaningful Career in ABA
Interested in a career helping children with autism? Discover rewarding ABA career opportunities.
Why Are Conditioned Reinforcers Important in ABA Therapy?
Conditioned reinforcers matter because they’re what make sustainable behavior change possible. Primary reinforcers like snacks or toys are powerful, but using them on every trial across every session quickly becomes impractical—and continually pairing tangible items with learning can interfere with the natural rhythms of daily life. Conditioned reinforcers solve that problem. Praise, attention, a smile, a checkmark, or a token can be delivered immediately, anywhere, by anyone, without disrupting the learning environment.
Building strong conditioned reinforcers also expands what a learner finds motivating. Many children begin ABA programs with a narrow range of reinforcers—often just food or a few preferred items. Through systematic pairing, the team can broaden that range to include social praise, peer attention, written words of recognition, the sense of completing a task, and other reinforcers that occur naturally in the home, school, and community. That broadening is part of what helps a learner generalize skills across settings.
This work is especially important in early intervention, when much of the foundational pairing happens. A young learner is just beginning to develop the social and motivational repertoire that will support a lifetime of learning, and a well-designed ABA program helps build the conditioned reinforcers that the world relies on outside of therapy. For more on the broader benefits of starting ABA support early, read our blog post on the 5 benefits of early intervention for autism.
Conditioned reinforcers are also the bridge to fading external reinforcement over time. As social praise and natural consequences gain reinforcing power, the team can step back from delivering tangible primary reinforcers on every trial. The learner’s behavior comes increasingly under the control of reinforcers that occur naturally in everyday life. For more on the foundational principle this all rests on, see our glossary entry on positive reinforcement.
FAQs About Conditioned Reinforcers
What’s the difference between a conditioned reinforcer and an unconditioned reinforcer?
An unconditioned reinforcer (also called a primary reinforcer) is reinforcing without any prior learning—food, water, warmth, sleep. These tap into biological needs and don’t require pairing to work. A conditioned reinforcer (or secondary reinforcer) starts as a neutral stimulus and becomes reinforcing only after being paired with something the learner already values. Praise, money, tokens, grades, and social approval are all conditioned reinforcers—they have no biological value, but they work because of learning history.
Can a conditioned reinforcer lose its reinforcing power?
Yes. Conditioned reinforcers depend on continued pairing with effective reinforcers, at least intermittently. If praise consistently fails to be followed by anything else the learner values, the praise can gradually lose its reinforcing power—a process called extinction. That’s why behavior technicians keep mixing in primary reinforcers and other valued consequences over the long run, especially during early skill acquisition. The pairing doesn’t need to be constant, but it does need to be reliable enough to maintain the conditioned reinforcer’s strength.
What is a generalized conditioned reinforcer?
A generalized conditioned reinforcer is one that has been paired with many different primary and conditioned reinforcers over time, so it can be exchanged for or associated with a wide variety of rewards. Money is the classic everyday example—it has been paired with food, shelter, entertainment, and countless other reinforcers, so it works across nearly any situation. Tokens in a well-established token economy also function as generalized conditioned reinforcers, since the learner can exchange them for a menu of different backup reinforcers.
How do behavior analysts identify which stimuli to build into conditioned reinforcers?
The behavior analyst typically starts by identifying stimuli that occur naturally and frequently in the learner’s daily life—praise, attention from caregivers, social interactions with peers, written or visual feedback. The goal is to build conditioned reinforcers that will work outside of therapy sessions, not just during them. A behavior technician then implements the pairing protocol consistently across sessions, and the team monitors whether the targeted stimulus is actually starting to function as a reinforcer by tracking its effect on behavior over time.
Are conditioned reinforcers used with all learners?
Yes, in some form. Every ABA program eventually relies on conditioned reinforcers because they’re the practical, scalable mechanism for sustaining behavior change. Younger learners or those new to ABA may rely more heavily on primary reinforcers early on while the team systematically builds the conditioned reinforcers that will sustain progress. Older or more experienced learners often work largely under the control of conditioned reinforcers like praise, social interaction, and intrinsic satisfaction with task completion. The shift between the two is one of the things a good ABA program manages deliberately.
Key Takeaways About Conditioned Reinforcers
- A conditioned reinforcer (or secondary reinforcer) is a stimulus that becomes reinforcing only after being paired with something the learner already finds reinforcing.
- Common conditioned reinforcers include praise, tokens, stickers, checkmarks, smiles, high-fives, and access to preferred activities.
- They differ from primary (unconditioned) reinforcers, which are reinforcing without any prior learning history—food, water, warmth, sleep.
- Conditioned reinforcers are built through deliberate pairing during therapy, often using primary reinforcers as the initial anchor.
- They’re what make sustained, scalable behavior change practical—a behavior technician can deliver praise constantly without disrupting the learning environment the way tangible items would.
- Conditioned reinforcers can lose their power if pairing with effective reinforcers stops, so the team maintains them through ongoing, intermittent pairing.
