Movement preparation in high-functioning autism and Asperger disorder: a serial choice reaction time task involving motor reprogramming.

Researchers watched how kids with autism and Asperger disorder get ready to move.

Everyone pressed buttons in a line as fast as they could. Sometimes the next button changed at the last second, so kids had to reprogram their move.

The team asked: do the groups plan moves the same way?

Autism group showed almost no early motor planning. They waited until the go signal to think.

Asperger group did plan ahead, but only for simple moves. When rules changed, they stalled.

Both groups still hit the right button in the end—execution looked normal.

Lizon et al. (2024) extend these results. They say autism motor rehab should train anticipation, not the same drills used for developmental coordination disorder.

Thomas et al. (2021) widen the picture. In a big survey, most kids with ASD also showed coordination disorder risk, and that risk made core symptoms worse.

Iarocci et al. (2017) seem to clash. They found jerky handwriting execution in autism, while our target paper says execution stays intact. The gap is timing: handwriting is online correction; button study measures final speed after planning.

You can add extra response-time cues in your sessions. Count down, use a metronome, or show the next move early. These supports give the motor system time to plan and may lower problem behavior that comes from sudden changes.