The use of programmed materials in the analysis of academic contingencies.

Six kindergarteners practiced handwriting letters on programmed sheets.

Each correct letter earned a plastic token. Later the kids got the same tokens no matter how they wrote.

The teacher switched the rules every day so each child served as their own control.

When tokens hinged on neat letters, accuracy shot up for every child.

When tokens came no matter what, accuracy dropped below the first baseline.

Free rewards actually hurt handwriting.

Matson et al. (1994) stretched the same idea to third-graders’ homework. They added written contracts and nightly goals. Homework accuracy rose just like the 1972 handwriting scores.

Protopopova et al. (2020) swapped tokens for two minutes with a therapy dog. Contingent dog time boosted math responses for kids with autism. Non-contingent time did nothing. The pattern mirrors the 1972 drop, showing the rule works across reinforcers and diagnoses.

Bacon-Prue et al. (1980) gave college students grade points for correct underlining. Again, points tied to right answers lifted comprehension. The contingency principle holds from preschool to university.

Tokens, points, or puppy time—kids work harder when the reward follows the right answer. Handing out stickers “for being here” can backfire. Next session, tie every token or break to a clear academic response and watch accuracy climb.