title: Measurement properties of the Wheelchair Skills Test-Questionnaire for powered wheelchair users.
abstract: OBJECTIVE
  To evaluate the test-retest reliability, concurrent validity and responsiveness of the Wheelchair Skills Test - Questionnaire (WST-Q) Version 4.1 for powered wheelchair users.
  
  
  METHODS
  A volunteer sample of 72 community-dwelling, experienced powered wheelchair users, ranging in age from 50 to 77 years, participated in this study. Participants completed measures at baseline and 1 month later.
  
  
  RESULTS
  Mean ± standard deviation total percentage WST-Q scores at baseline and 1 month were 83.7% ± 10.9 and 86.3% ± 10.0 respectively. Cronbach's alpha was 0.90 and the 1 month test-retest intraclass correlation coefficient (ICC1,1) was 0.78 (confidence interval: 0.68-0.86). There were no floor or ceiling effects. Percentages of agreement between baseline and 1 month for individual skills ranged from 72.2% to 100%. The correlations between the WST-Q and the objective Wheelchair Skills Test (WST), WheelCon and Life Space Assessment were r = 0.65, r = 0.47 and r = 0.47 respectively. The standard error of measurement (SEM) and smallest real difference (SRD) were 5.0 and 6.2 respectively.
  
  
  CONCLUSIONS
  The WST-Q 4.1 has high internal consistency, strong test-retest reliability and strong support for concurrent validity and responsiveness.
  
  
  CONCLUSIONS
  There is evidence of reliability, validity and responsiveness of the Wheelchair Skills Test - Questionnaire (WST-Q) among experienced older adult powered wheelchair users. The WST-Q can be used to measure powered wheelchair skills, guide intervention and measure change over time.
authors.affiliation: a École de réadaptation, Université de Montréal , Montréal , QC , Canada .|b Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal , Montréal , QC , Canada .
authors.forename: Paula W
authors.initials: PW
authors.lastname: Rushton
authors.affiliation: c Division of Physical Medicine and Rehabilitation , Dalhousie University , Halifax , NS , Canada .
authors.forename: R Lee
authors.initials: RL
authors.lastname: Kirby
authors.affiliation: d Department of Rehabilitation , Université Laval , Québec City , QC , Canada .|e Centre for Interdisciplinary Research in Rehabilitation and Social Integration, Institut de réadaptation en déficience physique de Québec , Québec City , QC , Canada , and.
authors.forename: Francois
authors.initials: F
authors.lastname: Routhier
authors.affiliation: f Department of Occupational Therapy , Nova Scotia Rehabilitation Centre Site, Queen Elizabeth II Health Sciences Centre , Halifax , NS , Canada.
authors.forename: Cher
authors.initials: C
authors.lastname: Smith
mesh_terms: D000368:Aged; D011211:Electric Power Supplies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009048:Motor Skills; D009788:Occupational Therapy / Q000379:methods* / Q000592:standards*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*; D014910:Wheelchairs
keywords: Outcome assessment (health care); rehabilitation; wheelchairs