title: Further development of the response scales of the Acquired Brain Injury Challenge Assessment (ABI-CA).
abstract: OBJECTIVE
  To revise the scaling of the response sets of the Acquired Brain Injury Challenge Assessment (ABI-CA) through expert input and determination of empirically based cut-points.
  
  
  METHODS
  A measurement development study with a content validity focus.
  
  
  METHODS
  Response option wording was revised through consultation with six physiotherapists with paediatric ABI expertise. Twenty-nine typically-developing children performed the ABI-CA and empirically-based cut-points for item-specific response options were derived from their time/distance/repetition results (SD values) as benchmark values. Movement quality considerations (compensatory movements) were identified from expert consultation/ABI-CA video observation and built into revised response options. The revised ABI-CA was pilot-tested with four children with ABI, aged 7-15 years, for a feasibility check.
  
  
  RESULTS
  Nineteen of the 23 items' response scales were revised based on experts' feedback and empirically-based cut-points replaced the previous arbitrarily-determined cut-points. Compensatory movement considerations were re-defined in nine items. The mean score of the refined ABI-CA was 70.0% (SD = 18.5) with four children with ABI.
  
  
  CONCLUSIONS
  The new response options in the ABI-CA appeared suitable for testing high-functioning children with ABI and the mid-range mean score in this pilot sample indicates its potential to measure change. Recommendations are outlined for final ABI-CA amendments before large-scale validation.
authors.affiliation: Department of Physical Therapy, Faculty of Medicine, University of Toronto , Toronto, Ontario , Canada .
authors.forename: Caitlin
authors.initials: C
authors.lastname: McArthur
authors.forename: Surabhi
authors.initials: S
authors.lastname: Venkatesh
authors.forename: Danielle
authors.initials: D
authors.lastname: Warren
authors.forename: Daniel
authors.initials: D
authors.lastname: Pringle
authors.forename: Tanya
authors.initials: T
authors.lastname: Doerr
authors.forename: Nancy Margaret
authors.initials: NM
authors.lastname: Salbach
authors.forename: Gail
authors.initials: G
authors.lastname: Kirkwood
authors.forename: Virginia
authors.initials: V
authors.lastname: Wright
mesh_terms: D000203:Activities of Daily Living; D000223:Adaptation, Psychological; D000293:Adolescent; D001930:Brain Injuries / Q000150:complications / Q000453:epidemiology*; D002170:Canada / Q000453:epidemiology; D002648:Child; D004185:Disability Evaluation; D005240:Feasibility Studies; D005260:Female; D015600:Glasgow Coma Scale; D006801:Humans; D008297:Male; D010865:Pilot Projects; D020127:Recovery of Function; D012720:Severity of Illness Index; D018434:Sickness Impact Profile; D013647:Task Performance and Analysis; D014743:Videotape Recording