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Representational gestures in Developmental Coordination Disorder and specific language impairment: Error-types and the reliability of ratings.
Hill, E. L., BISHOP, D. V. M., & NIMMO-SMITH, I.
Human Movement Science, 17, 655-678.
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Gesture production was studied in children with developmental coordination disorder (DCD) and specific language impairment (SLI) in comparison to normally developing age-matched and younger control children. The pattern of error production was investigated to characterize the praxis skills seen in these two developmental disorders as well as to inform understanding of the aetiology of both DCD and SLI. Given the subjective nature of the categorization of errors, a separate study was conducted to investigate inter-rater reliability. Independent adult raters consistently used four out of fourteen error-types and for these four, inter-rater reliability was found to be good. The type of errors made by children with DCD, SLI and the younger controls were very similar. The only difference between the groups was in the frequency with which errors were displayed, suggesting that the performance of the clinical children might be an indicator of immature praxis development. It is suggested that the inclusion of a younger control (similar to a “motor match”) group is an important methodological device for investigating the underlying nature of disorders such as DCD and SLI.