Among the studies supporting the independence between the two components, the study conducted by Schoemaker et al. (2001) specified that children with DCD differed only partially in their perceptual abilities (mainly as regards position in space
and figure completion tasks) from a control group. Significant differences in visual motor integration tasks came to the fore, in particular, in tasks involving a temporal component. For the authors it was not possible, however, to infer a direct, causal
relationship between perceptual deficit, which is heterogeneous in DCD children, and motor problems