Effects of choice and immediacy of reinforcement on single response and switching behavior of children.

The team worked with six typical kids in a small lab room.

Each child sat at a box with two levers. One lever gave a marble right away. The other gave a candy right away.

Later the setup changed. Now one lever let the child pick marble OR candy, but only after a short wait. The other lever gave only one item, but instantly.

The researchers timed how long kids stayed with each lever and counted button presses.

Kids spent more time at the lever that gave choice and immediate reward.

Their button pressing stayed about the same, but they stuck with the better option longer.

Choice plus no waiting beat choice with waiting, and both beat no choice at all.

Hamm et al. (1978) ran the same idea with adults and leisure items. Adults also worked harder when they could choose their reward. This shows the choice effect holds past childhood.

Duker et al. (1996) turned this finding into a tool. They showed a quick choice test can tell you which items will work as reinforcers. The 1973 study proved choice matters; the 1996 study shows how to use that fact.

Leung et al. (2014) pushed it further. They found kids also prefer schedules that mix work and short breaks over long waits for social praise. This extends the 1973 result from candy and marbles to teacher attention.

Attwood et al. (1988) seems to clash at first. They showed rats slow down when rewards come only at session end. But both studies agree: timing matters. The 1973 paper adds immediacy and sees more engagement. The 1988 paper removes immediacy and sees less. Same principle, opposite direction.

When you set up token boards or break tasks, give the child a quick choice of reward and deliver it right away. You might not see more responses per minute, but the child will stay with the activity longer. This small tweak costs nothing and keeps therapy moving.