title: The reliability of the Movement Assessment Battery for Children for preschool children with mild to moderate motor impairment.
abstract: OBJECTIVE
  To provide further evidence of the test-retest reliability and agreement of the Movement Assessment Battery for Children (M-ABC), a standardized motor test used for identification and evaluation of children with mild to moderate motor impairment. Both the stability of total test scores and classification according to specified cut-off points were examined.
  
  
  METHODS
  Children were tested on the M-ABC, three times with an interval of three weeks between each assessment.
  
  
  METHODS
  Thirty-three 4- and 5-year-old children with poor motor performance, 24 boys and 9 girls.
  
  
  RESULTS
  A systematic practice effect between three consecutive testing sessions was shown. This was significant for the total score and two of the three subscores. Test-retest reliability of the total test score yielded an intraclass correlation coefficient (ICC) of 0.88. The total impairment score ranged between 0 and 40. The standard error of measurement (SEM) of this score was 2.4, resulting in a least detectable difference of 6.6 (with alpha set at 5%). The agreement over three testing sessions (kappa) was 0.72.
  
  
  CONCLUSIONS
  The total impairment score of the M-ABC is a reliable measure for identification of mild to moderate motor impairment in young children. Repeated testing on the M-ABC at intervals of three weeks results in a systematic measurement error and is not recommended. The SEM is substantial. Follow-up of preschool children with the M-ABC as a single outcome measure is not appropriate.
authors.affiliation: Rehabilitation Sciences and Physiotherapy Ghent, University College and Ghent University, Belgium. hilde.vanwaelvelde@arteveldehs.be
authors.forename: Hilde
authors.initials: H
authors.lastname: Van Waelvelde
authors.forename: Wim
authors.initials: W
authors.lastname: Peersman
authors.forename: Matthieu
authors.initials: M
authors.lastname: Lenoir
authors.forename: Bouwien C M
authors.initials: BC
authors.lastname: Smits Engelsman
mesh_terms: D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D009048:Motor Skills; D019957:Motor Skills Disorders / Q000145:classification / Q000175:diagnosis*; D015203:Reproducibility of Results