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.
Unconditioned reinforcers are reinforcing because of our biology. People do not have to learn that food when hungry, water when thirsty, warmth when cold, or relief from pain are reinforcing. They strengthen behavior from the start, which is why they are also called primary or unlearned reinforcers. Some sensory stimulation also falls in this group.
Their value depends strongly on motivating operations. Food is a powerful reinforcer when the person is hungry and a weak one right after a meal. This makes unconditioned reinforcers useful in teaching, especially for learners who do not yet respond to praise, but it also means they are prone to satiation.
In practice, edibles are the most common unconditioned reinforcers used in sessions, delivered in small pieces as the plan specifies. Unconditioned reinforcers are also used to build conditioned reinforcers through pairing.
Access to food, water, warmth and rest is never something a client must earn. Using edibles as reinforcers means offering small extra amounts, not withholding meals.
Example and non-example
| Example | For a toddler who does not yet respond to praise, the plan uses tiny pieces of a preferred snack as reinforcers for imitating actions, paired with praise each time. |
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| Non-example | A teen works to earn points that can be traded for video game time. Points are conditioned reinforcers; their value comes from what they can be exchanged for. |
Don't confuse it with
| Conditioned reinforcer | A conditioned reinforcer gets its value through pairing; an unconditioned reinforcer needs no learning history. |
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Test yourself
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Question 1Which of these is an unconditioned reinforcer?
Show answer
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 3Which of these is a generalized conditioned reinforcer?
Show answer
C: Tokens that can be traded for many different items. Tokens that can be exchanged for many different backup reinforcers are generalized conditioned reinforcers: their value comes from pairing with many reinforcers.
- A: Juice for a thirsty client is an unconditioned reinforcer.
- B: Warmth for a cold client is an unconditioned reinforcer.
- D: Food for a hungry client is an unconditioned reinforcer.
Task C.2 · 40-hour curriculum section E
Answer every question to see your score.
On the RBT exam
This term belongs to task C.2 Conditioned reinforcers in content area C, Behavior Acquisition, which is 19 of the 75 scored questions.