Learning to wait for more likely or just more: greater tolerance to delays of reward with increasingly longer delays.

The team tested two ways to stretch how long people will wait for a reward. One group got bigger rewards the longer they waited. The other group got a chance at a bigger reward that became more likely the longer they waited.

All participants started with short waits. Over days the waits grew longer. The researchers tracked who kept choosing to wait.

Both fading styles worked. Everyone learned to wait for the delayed payoff. The twist came when new, untested delays appeared.

People trained with the chance-based reward handled the new delays better. Their waiting skill spread. People trained only with bigger rewards did not keep the same calm when the delay changed.

Dunkel-Jackson et al. (2016) used the same delay-fading idea with adults with autism. They added a work task during the wait and saw big gains, showing the method crosses diagnostic lines.

Cullinan et al. (2001) stretched waits up to 24 hours in kids with ADHD. The 2015 lab study mirrors that success in neurotypical adults, tightening the loop between basic and applied work.

Haynes et al. (2023) later showed that simply letting rats experience delays before choice tests cuts impulsive picks. This supports the 2015 finding that experience with probabilistic delays, not just bigger snacks, builds durable self-control.

If you want clients to wait calmly for reinforcement, shape the wait with uncertain but improving odds, not just bigger prizes. Start with short waits, then stretch them. Use spinners, token bags, or mystery bonuses that become richer as the delay grows. This keeps the skill strong even when new wait times pop up.