Pavlovian learning and conditioned reinforcement

Madden and colleagues reviewed decades of Pavlovian conditioning studies. They asked one question: how can behavior analysts use these old findings to build better conditioned reinforcers?

The team pulled lab data from animal and human experiments. They focused on pairings where a neutral item is shown right before an already-strong reward.

The review shows that timing is everything. A neutral stimulus must overlap or follow the real reward within seconds. When the gap grows, the new reinforcer loses power.

The paper also warns against mixing operant and Pavlovian rules. Delivering praise two minutes after the behavior is an operant schedule, not a Pavlovian pairing, and it weakens the new reinforcer.

Griesi-Oliveira et al. (2013) ran a rat study that backs the timing rule. Longer delays between lever press and conditioned reinforcer slowed learning. The lab data match the review’s advice: keep the gap tiny.

Lewon et al. (2026) extend the argument. They say Pavlovian processes are already hiding in your token boards and praise. The 2026 paper simply tells you to plan for them, building on the 2023 call to pair stimuli on purpose.

McGonigle et al. (1982) showed the same idea with pigeons. A brief light that flashed right after the key peck worked as a reinforcer even when food came later. Again, immediacy beat duration.

You can strengthen any conditioned reinforcer in two steps. First, deliver the real reward within one second of the neutral item. Second, keep that same brief gap when you later use the new reinforcer during teaching. Try it with stickers, points, or praise: give the primary reward instantly the first few times, then fade it. Your learners will respond faster and maintain the skill longer.