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A number of closed-loop postulations to explain motor skills learning and performance phenomena have appeared recently, but each of these views suffers from either (a) logical problems in explaining the phenomena or (b) predictions that are not supported by the empirical evidence. After these difficulties are discussed, a new theory for discrete motor(More)
Teachers in four schools for normal children aged between five and eight years took part in a two-year investigation of developmental clumsiness. After a year's preliminary discussion they identified 20 children from a total of 400 who met the following criteria: (1) had poor motor co-ordination for their age and (b) whose poor motor co-ordination was(More)
BACKGROUND The aims of this study were to measure objectively the extent and severity of motor impairment in children with Asperger's syndrome and to determine whether the motor difficulties experienced by such children differed in any way from those classified as having a Specific Developmental Disorder of Motor Function (SDD-MF). Criteria derived from ICD(More)
The relationship between visual and perceptual-motor abilities at 6 years of age was investigated in a cohort of 141 prematurely born children without cerebral palsy. Visual acuity was assessed using the Sonksen-Silver Acuity System and stereopsis with the Titmus stereo test. Perceptual motor abilities were evaluated using the Movement Assessment Battery(More)
Awareness of children who experience unexpected difficulty in the acquisition of motor skills has increased dramatically over the last twenty years. Although the positing of a distinct syndrome has proven seminal in provoking further questions, several basic terminological problems remain unresolved. In this paper, we conduct a component analysis of the(More)
Three experiments examined the role of various sources of feedback in the development and maintenance of a complex ballistic skill, dart throwing, using extended practice. Even a brief delay of visual feedback initially affected accuracy and consistency adversely, though with practice performance gradually recovered. A total absence of visual feedback(More)
Three studies concerning the inter-rater and test-retest reliability of the Touwen examination are presented. The results of the first study showed that it was not possible to achieve acceptable levels of reliability using the manual as the only reference for instruction. Although the reliability estimates of the total scores were good, inter-rater(More)
The aim of this study was to determine whether perceptual-motor competence in school-age children with Down syndrome was generally delayed or varied as a function of type of action. Twenty-two children with Down syndrome (13 males, 9 females), aged between 4.5 and 14 years were assessed on two standardized tests, the Movement Assessment Battery for Children(More)
The question of whether problems of motor co-ordination in early childhood recede with age has rarely been addressed. This paper reports the findings from a follow-up study of 17 children, identified by their teachers as having poor motor co-ordination at age six. Now age 16, these children and their matched controls completed a battery of assessments. The(More)
Diffuse white matter changes on magnetic resonance imaging (MRI) have been a consistent feature in some children with the "pure" form of congenital muscular dystrophy (CMD) in which there are no structural changes in the brain or severe mental retardation. The aim of this study was to assess fine motor and perceptuo-motor abilities in children with CMD with(More)