Increasing spontaneous play by suppressing self-stimulation in autistic children.

Hawkes et al. (1974) worked with autistic children who spent most free time in hand-flapping or rocking.

The team used a simple reversal design. They first let the kids self-stimulate. Then they blocked the movements. Then they let the movements return. Then they blocked again.

Play toys were always on the table. The only change was whether adults stopped the self-stimulation.

When self-stimulation was blocked, the kids picked up toys and played. When blocking stopped, the flapping came back and play dropped.

The effect flipped each time the rule changed. The play gains were immediate and large.

Esposito et al. (2021) repeated the logic with a 2021 twist. They paired movie clips with brief silent gaps. Stereotypy dropped and toy play rose, just like in 1974.

Falligant et al. (2020) moved the same idea into teen leisure. They added response interruption and timed access to video games. Motor stereotypy still fell, showing the trick works past early childhood.

Ding et al. (2017) asked if you need to block the behavior at all. They gave kids sensory-matched toys for free. Stereotypy still dropped. Their result extends the 1974 finding: you can either stop the movement or flood the senses with a safer match.

You now have three levers for stereotypy: block it, replace the sensory payoff, or do both. Start with the fastest probe—brief response blocking during play time. If blocking is hard to staff, switch to non-contingent sensory toys. Either way, watch for the same instant jump in toy play that L et al. saw 50 years ago.