One-handed catching behavior was studied in nine 6- to 8-year-old boys with Developmental Coordination Disorder (DCD) and nine matched typically developing boys. The participants performed a catching task under two conditions. In the first condition, one ball speed was used while three ball speeds were randomly presented in the second condition. Boys with DCD showed a significantly smaller maximal hand aperture and a lower maximal closing velocity in both the first and the second condition; however, the temporal structure of the catch as well as the adaptations to the varying ball speeds did not differ between groups. This leads to the suggestion that the motor problems of boys with DCD in one-handed catching are not primarily due to debilitated visuo-perceptual or planning processes but are more likely caused by problems at the execution level.
Frederik J.A. Deconinck is with the Department of Movement and Sports Sciences, Faculty of Medicine and Health Sciences, Ghent University. E-mail: Frederik.Deconinck@UGent.be. Dirk De Clercq is with the Department of Movement and Sports Sciences, Ghent University. Geert J.P. Savelsbergh is with the Institute for Fundamental and Clinical Human Movement Sciences, Vrije Universiteit Amsterdam and Institute for Biophysical and Clinical Research into Human Movement, Manchester Metropoliton University. Rudy Van Coster is with the Department of Pediatrics and Medical Genetics, Ghent University. Ann Oostra and Griet Dewitte are with the Centre for Developmental Disorders of Ghent, Belgium. Matthieu Lenoir is with the Department of Movement and Sports Sciences, Faculty of Medicine and Health Sciences, Ghent University.