Reaching to throw compared to reaching to place: a comparison across individuals with and without Developmental Coordination Disorder.

Wilmut et al. (2013) watched adults and kids reach for a ball. Some had Developmental Coordination Disorder. Some were typically developing.

The task was simple. Reach to throw the ball into a box. Or reach to place it gently. Cameras tracked every arm angle and speed.

Typical adults changed their reach for each goal. They sped up for throwing, slowed for placing.

People with DCD used the same reach no matter the goal. Kids with DCD showed the biggest gap. Their brain’s “forward model” for fine-tuning moves was still missing.

Purcell et al. (2011) also saw blunt planning in DCD. Their kids waited too long to cross a road because they mis-judged car speed. Both studies flag the same core issue: weak action planning, not weak muscles.

Goulardins et al. (2013) looked at autism, not DCD. They found planning was fine; the delay came later, during the actual move. Kate’s DCD group shows the opposite pattern—planning is off, execution looks normal. The two papers together tell us to test both phases before writing goals.

Chang et al. (2013) used a tablet to catch dysgraphia. Longer pauses and extra speed changes mirrored Kate’s extra arm adjustments. Different diagnosis, same clue: watch the movement path, not just the final product.

If a client with DCD reaches the same way for every task, don’t expect precision to appear on its own. Build drills that force small speed or angle changes and give immediate feedback. Start with big contrasts—throw vs. place—then shrink the difference. Your data sheet can track whether the reach looks different before you even score accuracy.