Which of the following are examples of primary reinforcement or punishment stimuli?

• A. Food and Pain
• B. Praise and petting
• C. Tokens and points
• D. Social attention

Answer: (A)

The main idea here is the difference between primary (unconditioned) stimuli and secondary (conditioned) stimuli. Primary reinforcers and punishers are biologically relevant: they affect the animal directly without any learning. Food satisfies a basic need, so it reliably increases the likelihood of a behavior when used as a reinforcer. Pain is an unlearned punisher because it inherently signals harm and decreases the likelihood of a behavior when experienced.

Praise, petting, tokens, points, and social attention are typically considered secondary reinforcers or punishers. They acquire their value through association with primary consequences (for example, attention often leads to access to a primary reward or relief from discomfort, and tokens or points gain meaning because they can be exchanged for rewards). They are not inherently reinforcing or punishing in the same biological way as food or pain.

So, the examples that fit primary reinforcement or punishment are food (a primary reinforcer) and pain (a primary punisher).