Similar findings were found in a ball-dropping adaptation task where weights of the balls were different. Children with high-functioning autism (HFA) and age-matched controls were required to catch one of two identical balls of different weights (one light and one heavy) while attempting to maintain their hand position. The light ball was used during baseline and after-effect phase, and the heavy ball was used in the adaptation phase to see how participants adapted to the change. The results, again, suggested that children with ASD could adapt as quickly as the matched controls with a similar level of after-effect. The authors concluded that children with ASD appeared to
have a normal ability to learn from a mismatch between the predicted and observed proprioceptive consequences and rapidly update the internal model of the consequences of the ball’s impact on their arm.