C.2 Conditioned reinforcers
A conditioned reinforcer is a stimulus, such as praise, a token or a check mark, that has become a reinforcer because it was paired with reinforcers the client already values. RBTs help establish conditioned reinforcers through planned pairing and then use them to deliver reinforcement quickly, in many settings and, when they can be traded for many backups, with less satiation than a single snack or toy.
What the outline says
Task C.2 in content area C, Behavior Acquisition (19 of the 75 scored questions): "Implement procedures to establish and use conditioned reinforcers."
Unconditioned and conditioned reinforcers
Unconditioned (primary) reinforcers work without any learning history. Food, water, warmth and relief from pain are examples. Their strength still changes with motivating operations: food is a strong reinforcer for a hungry client and a weak one after a large meal.
Conditioned (secondary) reinforcers start as neutral stimuli, things that have no effect on behavior, and gain their value by being paired with existing reinforcers. Praise, smiles, stickers, grades, points, tokens and money are common examples. Because their value comes from each person's history, a conditioned reinforcer that works well for one client may do nothing for another. A new young client may not yet respond to praise at all.
A generalized conditioned reinforcer has been paired with many different reinforcers. Attention, approval, money and tokens that can be traded for many items are examples. Their value does not depend on one specific motivating operation, so they are less affected by satiation on any single item.
How pairing works
To turn a neutral stimulus into a conditioned reinforcer, present it just before or at the same moment as a reinforcer the client already values, and do this many times. The new stimulus should reliably predict the established reinforcer:
- Say "Nice work!" or hand over the token, then immediately give the snack or toy.
- Keep the pairing consistent. If the word often occurs with no reinforcer, or the reinforcer often comes without the word, the word predicts little and the pairing is weak.
- Do not present the new stimulus long after the reinforcer is gone; that order and delay give it nothing to signal.
Building a conditioned reinforcer can take many pairings. If a stimulus has not started to affect behavior yet, continue the pairing as written and share the data with your supervisor.
You will also hear "pairing" used for the RBT: at the start of services you may be asked to pair yourself with reinforcement by joining the client's preferred activities and offering preferred items while placing few demands. Over time your presence and attention can become conditioned reinforcers. Pairing works in both directions. If your arrival is always followed by difficult work and nothing else, your presence can come to signal aversive conditions, and the client may try to escape or avoid you.
Why conditioned reinforcers are useful
- They can be delivered immediately, bridging the delay between a response and a backup reinforcer that comes later.
- They are portable and quick, so you can reinforce during a grocery trip or a group lesson without stopping the activity.
- Generalized conditioned reinforcers are less affected by satiation than a single edible.
- Praise and other social reinforcers occur naturally in everyday life, so they help behavior continue after formal teaching ends.
A common plan pairs praise with tokens or edibles by delivering them together, so that praise gains value. Later, the supervisor can fade the tokens or edibles while praise keeps the behavior going.
Tokens and backup reinforcers
In a token system, the client earns tokens (chips, stickers, check marks or points) for target behaviors and exchanges them for backup reinforcers, the items or activities the tokens buy. The exchange rate is the price of each backup in tokens.
To keep tokens working:
- Teach the exchange first. Early on, the client often trades after only one or two tokens so the tokens quickly lead to something valuable.
- Offer a menu of backup reinforcers. The supervisor may ask you to run a preference assessment to find candidates (B.1).
- Honor every exchange. If the chosen item is unavailable, offer another from the plan's menu.
- Control access. If the client can take tokens freely, or can get the backup reinforcer without tokens, the tokens lose their value.
- Follow the exchange rule. The supervisor may thin the requirement over time (2 tokens, then 5, then 10); you do not change it on your own.
A conditioned reinforcer keeps its value only through continued pairing. If tokens can no longer be exchanged, or the client is satiated on every backup, the tokens will weaken. Token economies as a full system are covered in C.11.
Your role
Your supervisor decides which stimuli to condition, how to pair them and how to set up the token system. You carry out pairing and token delivery with fidelity, deliver conditioned reinforcers immediately and only after the target behavior, and collect data. The test of whether a stimulus has become a reinforcer is the same as for any reinforcer: the behavior that produces it increases. Smiles and interest are encouraging, but they are not evidence. Report changes such as a client ignoring tokens, choosing no backup items or asking to trade early, and pass on ideas such as adding response cost to your supervisor instead of trying them yourself.
Examples and non-examples
| Example | Non-example |
|---|---|
| An RBT says "Great!" and immediately hands the client a preferred toy, many times across sessions, until correct responses increase when followed by "Great!" alone. | An RBT gives the toy, waits until play is over, and then says "Great!" The word comes after the reinforcer has ended and is unlikely to gain value. |
| A teen earns check marks for chores and trades 10 check marks for video game time. The check marks are conditioned reinforcers and the game time is the backup reinforcer. | A thirsty client gets a drink of water after finishing a task. Water for a thirsty person is an unconditioned reinforcer; it needs no pairing. |
Common mistakes
- Assuming praise works for every client. Praise is a conditioned reinforcer and may need to be paired with established reinforcers first.
- Presenting the new stimulus after the reinforcer has ended, or inconsistently. Present it just before or with the established reinforcer, every time.
- Delaying or skipping exchanges. Tokens keep their value only if they reliably buy backup reinforcers.
- Leaving tokens or backup items freely available. Free access breaks the contingency and lowers the tokens' value.
- Adding response cost or changing the exchange rate without the supervisor. Suggest changes; do not make them.
How it's tested
Expect questions that ask you to sort reinforcers into unconditioned, conditioned and generalized conditioned, or to pick the correct pairing procedure. Look at whether the stimulus needed a learning history (conditioned) or works on its own (unconditioned), and whether it has been paired with one reinforcer or many (generalized). Scenario items often describe tokens that stop working; the cause is usually a broken link to backup reinforcers, such as no exchange, satiation on the backups or free access. The right RBT action is to follow the plan and report to the supervisor.
Practice questions for task C.2
10 of our 34 questions on this task. The rest are in the Behavior Acquisition practice sets and the mock exams.
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Question 1Which of these is an unconditioned reinforcer?
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C: Water for a client who is thirsty. Unconditioned (primary) reinforcers, such as food, water and warmth, are effective without any learning history, although their value still depends on motivating operations such as thirst.
- A: Praise gains its value through a history of pairing with other reinforcers, so it is a conditioned reinforcer.
- B: Stickers become reinforcers through learning, so they are conditioned reinforcers.
- D: Tokens gain their value by being exchanged for backup reinforcers, so they are conditioned reinforcers.
Task C.2 · 40-hour curriculum section E
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Question 2Which of these is a conditioned reinforcer?
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B: A gold star on a progress chart. A gold star has no value on its own; it becomes a reinforcer through a history of being paired with other reinforcers. That makes it a conditioned reinforcer.
- A: Food for a hungry person is an unconditioned reinforcer; it needs no learning history.
- C: Warmth for a cold person is an unconditioned reinforcer.
- D: Water for a thirsty person is an unconditioned reinforcer.
Task C.2 · 40-hour curriculum section E
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Question 3Why are tokens that can be traded for many different items less likely to lose their effectiveness during a long session than a single type of snack?
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A: Their value does not depend on one specific motivating operation.. Because tokens can be exchanged for many backup reinforcers, they stay valuable even when the client is satiated on one item. A single snack loses value as the client has more of it.
- B: Tokens are conditioned reinforcers, and they can lose value if their backup reinforcers lose value.
- C: Tokens can be delivered on many schedules, including intermittent ones.
- D: Preference varies by client; tokens are not always preferred over edibles.
Task C.2 · 40-hour curriculum section E
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Question 4In a pairing procedure meant to establish a new token as a reinforcer, the client is given a cracker and is shown the token only after finishing eating. After many trials, the token still does not affect the client's behavior. Which change to the procedure is most likely to help?
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A: Present the token just before or as the cracker is delivered.. Pairing works best when the neutral stimulus comes just before or together with the established reinforcer, so the token reliably signals that the cracker is coming.
- B: Presenting the token without the cracker weakens the pairing instead of building it.
- C: A longer delay after the cracker makes the token even less likely to signal it.
- D: Random presentation means the token does not predict the cracker, so pairing will not occur.
Task C.2 · 40-hour curriculum section E
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Question 5In a token system, what does the exchange rate refer to?
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A: How many tokens each backup reinforcer costs. The exchange rate is the price of backup reinforcers in tokens, for example 5 tokens for a turn on the swing.
- B: How many tokens each response earns is the token earning schedule, not the exchange rate.
- C: When trades happen is the timing of the exchange, not the price of backup reinforcers.
- D: Removing tokens for problem behavior is response cost.
Task C.2 · 40-hour curriculum section E
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Question 6In a classroom token system, tokens are normally exchanged for items from a prize box. For several weeks, the prize box is not available, but tokens are still delivered for the target behavior and can no longer be traded for anything. What is most likely to happen?
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B: The tokens will probably lose their effectiveness as reinforcers.. A conditioned reinforcer keeps its value through continued pairing with other reinforcers. When tokens can no longer be exchanged, that pairing stops and the tokens are likely to lose their effectiveness.
- A: Conditioned reinforcers do not become unconditioned; their value depends on learning.
- C: A conditioned reinforcer's value is not permanent; it weakens without continued pairing.
- D: Losing the backup makes tokens weaker reinforcers; it does not make them punishers.
Task C.2 · 40-hour curriculum section E
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Question 7A client earns a token immediately after each correct response but receives the backup reinforcer only at the end of the work period. What role does the token play?
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D: It bridges the delay between the response and the backup reinforcer.. A key advantage of conditioned reinforcers is that they can be delivered immediately, bridging the time between the response and a backup reinforcer that comes later.
- A: Tokens delivered after each correct response are contingent, not noncontingent.
- B: Tokens keep their value only while they continue to be exchanged for backup reinforcers.
- C: Tokens are conditioned reinforcers, not unconditioned ones.
Task C.2 · 40-hour curriculum section E
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Question 8Two clients in the same group use the same token board and the same backup items. One client works steadily for tokens, while the other ignores them. What is the most likely explanation?
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C: Each client's history and current motivation give the tokens a different value.. Whether a conditioned reinforcer works depends on the individual's learning history and on the current value of its backup reinforcers. The same system can work well for one client and poorly for another.
- A: Tokens are conditioned reinforcers, and their effect differs between individuals.
- B: Nothing suggests the client cannot learn; the tokens or backups may simply not have been established as valuable for this client yet.
- D: Satiation lowers a reinforcer's value; it would reduce working, not increase it.
Task C.2 · 40-hour curriculum section E
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Question 9During a community outing to a grocery store, the plan uses tokens instead of giving the client tablet time after each target behavior. Which advantage of conditioned reinforcers does this take advantage of?
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D: They can be delivered quickly without interrupting the ongoing activity.. Tokens are portable and can be handed over in seconds, so reinforcement can be delivered immediately without stopping the shopping trip for tablet time.
- A: Tokens keep their value only if they continue to be exchanged for backup reinforcers.
- B: Tokens are conditioned reinforcers, not unconditioned ones.
- C: Tokens should still be delivered contingent on the target behavior.
Task C.2 · 40-hour curriculum section E
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Question 10Early in a token system, the client exchanges tokens after earning 2 of them. Over the following weeks, the supervisor's plan raises the requirement to 5 tokens and then 10. What is this change called?
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B: Gradually thinning the exchange requirement. Increasing the number of tokens needed before an exchange, in planned steps, thins the schedule of backup reinforcement so that the client works longer for each backup reinforcer.
- A: Response cost is the removal of tokens after a behavior, not a higher exchange requirement.
- C: Satiation is a loss of reinforcer value from recent heavy access; raising the requirement does not create it.
- D: The tokens have already been paired; this change is about how many are needed per exchange.
Task C.2 · 40-hour curriculum section E
Answer every question to see your score.
Key terms
| Conditioned reinforcer | A stimulus that was once neutral and became reinforcing because it was paired with unconditioned reinforcers or other established reinforcers; also called a secondary or learned reinforcer. |
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| Unconditioned reinforcer | A stimulus that functions as a reinforcer without any learning history, such as food, water, warmth, or escape from pain; also called a primary or unlearned reinforcer. |
| Generalized conditioned reinforcer | A conditioned reinforcer that has been paired with many different reinforcers, such as money, tokens, or attention, so its value does not depend on any single motivating operation. |
| Pairing | Presenting a neutral stimulus together with, or just before, an established reinforcer so that the neutral stimulus comes to function as a conditioned reinforcer. |
| Token economy | A reinforcement system in which a learner earns tokens for target behaviors and later exchanges them for backup reinforcers. |
| Backup reinforcer | The item, activity or privilege a learner receives in exchange for tokens, which gives the tokens their reinforcing value. |
| Satiation | A temporary decrease in how effective a reinforcer is, caused by recent contact with a lot of that reinforcer; it also makes behavior that produces it less likely. |
| Motivating operation | An environmental variable that temporarily changes how reinforcing a stimulus is and changes how often behavior that has produced that stimulus occurs. |
| Immediacy | Delivering a reinforcer right after the target behavior; the shorter the delay between a response and its consequence, the more effective reinforcement usually is. |
| Schedule of reinforcement | A schedule of reinforcement is a rule stating which responses will be reinforced, based on the number of responses, the passage of time, or both. |
| Contingency | A dependent relation between a behavior and a consequence: the consequence is delivered only if the behavior occurs (if this behavior, then this consequence). |
| Response cost | A negative punishment procedure in which a specific amount of a reinforcer, such as tokens or points, is removed contingent on a behavior, reducing that behavior. |
| Escape | Escape is a form of negative reinforcement in which a behavior ends or reduces an aversive stimulus that is already present, making that behavior more likely in the future. |
| Avoidance | Avoidance is a form of negative reinforcement in which a behavior prevents or postpones an aversive stimulus, so that behavior becomes more likely in the future. |