title: Measuring advanced motor skills in children with cerebral palsy: further development of the Challenge module.
abstract: OBJECTIVE
  Since previous testing of the Challenge Module revealed that response scales should assess performance speed as well as skill accomplishment, this study sought to develop empirically based dual-criterion (accomplishment and time) response options.
  
  
  METHODS
  Challenge items were tested with a convenience sample of 34 children who were typically developing (4-10 years) to obtain time cut-points that could be applied to children/youth with cerebral palsy. Median/lower quartile item performance times were calculated within younger (<7.5 years) and older child (≥7.5 years) groups, and used as benchmarks for response option cut-points. Children's scores were recalculated using these cut-points to verify that differences in younger and older children's abilities and times were captured.
  
  
  RESULTS
  Mean scores were 48.9% and 87.2% for younger and older groups, reflecting expected developmental progression. Further response revision captured high-level movement control older children exhibited.
  
  
  CONCLUSIONS
  The revised Challenge measures skill accomplishment, speed, and quality.
authors.affiliation: University of Manitoba (Dr Glazebrook), Winnipeg, Manitoba, Canada; Bloorview Research Institute and Department of Physical Therapy, University of Toronto (Dr Wright), Toronto, Ontario, Canada.
authors.forename: Cheryl M
authors.initials: CM
authors.lastname: Glazebrook
authors.forename: F Virginia
authors.initials: FV
authors.lastname: Wright
mesh_terms: D000367:Age Factors; D002547:Cerebral Palsy / Q000534:rehabilitation*; D002648:Child; D002675:Child, Preschool; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D009048:Motor Skills; D026741:Physical Therapy Modalities; D015203:Reproducibility of Results