Instructions, feedback, and reinforcement in reducing activity levels in the classroom.

Teachers clipped a small box to each child's belt. The box clicked faster when the child moved more.

Kids earned candy or toy tokens every time their clicks stayed under a set limit. The researchers flipped the rule on and off four times to be sure the clicks and tokens were the real cause.

Eight of eleven children cut their moving around by at least one-fifth while the clicks and rewards were active. When rewards stopped, movement shot back up. The clicks alone did little until the candy joined in.

Wilder et al. (2020) ran the same two-step recipe—sound first, then add edibles—to stop toe walking in kids with autism. Their squeakers matched the 1979 clicks, showing the pair keeps working across decades.

Feldman et al. (1999) later handed the click button to the students themselves. Self-operated beeps also calmed disruptive behavior, proving the cue works even when kids run it.

Patel et al. (2019) flipped the coin: they used tokens to raise, not lower, activity in preschoolers. Tokens can dial movement up or down depending on what you reward.

If you have a hyperactive client in a special-ed room, tape a cheap step counter to the waistband and set it to beep when steps exceed a limit. Pair the beep with immediate skittles or stickers. Run a quick reversal to prove control, then thin the rewards. The 1979 gear is now a phone app, but the rule still holds: sound plus small edible equals calmer bodies.