A functional analysis of moderate-to-vigorous physical activity in young children.

The team ran a functional analysis on MVPA in preschoolers. They set up short play sessions where kids could earn adult attention and interactive play only when they hit moderate-to-vigorous activity levels. Other sessions gave attention for free or removed it completely. The design flipped these conditions back and forth to see which one pushed activity up.

Attention plus interactive play, delivered only when kids moved hard, beat every other setup. Baseline and free-attention sessions stayed flat. The moment the adults played along only after MVPA, step counts and heart rate jumped.

Patel et al. (2019) swapped the reinforcer: they gave tokens instead of hugs and high-fives. Tokens still worked, showing the contingency, not the form, drives the effect. Hart et al. (1968) did the same trick fifty years earlier for cooperative play—contingent adult praise beat random cheer, foreshadowing this MVPA boost.

Foster et al. (1979) looks like a flip. They used contingent tokens to calm hyperactive grade-schoolers down, not fire them up. The difference is goal and group: the 1979 kids already moved too much; these preschoolers needed more. Same tool, opposite direction.

Goldman et al. (2021) stretched the idea to children with autism. Brief bouts of contingent activity cut stereotypy and lifted on-task behavior, proving the principle travels past neurotypical preschool.

You now have a cheap, fast reinforcer for MVPA: your own face and voice, delivered the instant the child sweats. No tokens, no stickers, no extra gear. Use it during recess, gym, or indoor movement breaks. Pair it with Patel’s token system later if you want variety, but start with pure social reinforcement—this study says it’s enough.