title: Online corrections in children with and without DCD.
abstract: Human arm movements need 'online' corrections due to noise in perception and action. A Step-Perturbation paradigm explored online corrections in control children and children with DCD aged between 7 and 13 years. Control children found the task straightforward: a distracter had no effect and they managed to stop relatively quickly. Children with DCD found the task difficult and the apparatus was modified accordingly (decreased postural and force production demands). The distracter affected some children with DCD and some found it difficult to stop. All of the DCD population showed poorer performance in both the perturbation and non-perturbation condition. Nevertheless, there was no interaction between group and condition. Thus, this study found no evidence for specific deficits in online correction mechanisms in DCD. We suggest that: (i) fundamental problems in generating basic movements can account for the documented difficulties in correcting on-going movements, and (ii) such fundamental difficulties make it very difficult to pinpoint specific mechanism deficits.
authors: School of Psychology, College of Life Sciences and Medicine, University of Aberdeen, Aberdeen AB24 2UB, Scotland, United Kingdom. m.plumb@abdn.ac.uk
authors: Mandy S
authors: MS
authors: Plumb
authors: Andrew D
authors: AD
authors: Wilson
authors: Amy
authors: A
authors: Mulroue
authors: Anne
authors: A
authors: Brockman
authors: Justin H G
authors: JH
authors: Williams
authors: Mark
authors: M
authors: Mon-Williams
mesh_terms: D000293:Adolescent; D001288:Attention; D002648:Child; D003118:Color Perception; D003463:Cues; D030141:Feedback, Psychological; D005260:Female; D006801:Humans; D007360:Intelligence; D007699:Kinesthesis; D008297:Male; D019957:Motor Skills Disorders / Q000175:diagnosis* / Q000534:rehabilitation; D009788:Occupational Therapy; D009949:Orientation; D011930:Reaction Time; D012606:Scotland