title: Predicting fitness to drive using the visual recognition slide test (USyd).
abstract: OBJECTIVE
  The authors examined the construct and predictive validity and internal reliability of the Visual Recognition Slide Test developed at the University of Sydney (VRST-USyd).
  
  
  METHODS
  A historical cohort study using retrospective descriptive analysis of VRST-USyd scores and on-road driving performance for 838 drivers with impairments was conducted.
  
  
  RESULTS
  Rasch analysis provided evidence for the construct validity and internal reliability of the VRST-USyd. Goodness-of-fit statistics for all items were acceptable. The test had high participant and item reliability indexes and separated the participants into four groups with varying levels of skill. Using a cutoff score of 95/164, the sensitivity of the test was 81%, and the specificity was 90%. However, when coupled with clinicians' judgment of participants' awareness of their driving performance during the on-road assessment, this score improved.
  
  
  CONCLUSIONS
  There is evidence for reliability and construct and predictive validity of the VRST-USyd. The measurement of awareness requires further research.
authors.affiliation: Discipline of Occupational Therapy, Faculty of Health Sciences, University of Sydney, P.O. Box 170, Lidcombe, New South Wales 1825, Australia. L.Kay@usyd.edu.au
authors.forename: Lynnette G
authors.initials: LG
authors.lastname: Kay
authors.forename: Anita C
authors.initials: AC
authors.lastname: Bundy
authors.forename: Lindy M
authors.initials: LM
authors.lastname: Clemson
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001334:Automobile Driving / Q000331:legislation & jurisprudence*; D001336:Automobiles / Q000331:legislation & jurisprudence*; D003071:Cognition; D003072:Cognition Disorders / Q000175:diagnosis; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D008875:Middle Aged; D010364:Pattern Recognition, Visual; D011581:Psychological Tests; D015203:Reproducibility of Results; D012189:Retrospective Studies; D014787:Vision Tests