Fig 1.

(A) Experimental task and protocol. The shapes template was presented to the child just before beginning the task. Children were asked to match maximum number of shapes with the corresponding template for 30 s. The task was repeated 4 times. (B) Performance of the shape-matching task in single-task condition. In a single-task condition, children performed the shape-matching task while sitting on a stable surface (chair). (C) Performance of the shape-matching task in dual-task condition. In dual-task condition, children performed the shape-matching task while sitting on a dynamic surface (therapy ball).