P-Drive On-Road: Internal Scale Validity and Reliability of an Assessment of On-Road Driving Performance in People with Neurological Disorders

The aim of this study was to determine internal scale validity and reliability of P-Drive on-road by observing driving performance among people with neurological disorders. The study comprised a consecutive sample of 205 persons with stroke, dementia, or mild cognitive impairment who were remitted for and performed a standardized test in real traffic. Their driving abilities were evaluated with a new assessment tool, P-Drive on-road. Aspects of validity and reliability of the tool were analyzed using a Rasch rating scale model. The results indicated that the rating scale functioned as intended and a principal component analysis indicated that the items formed a unidimensional scale. Acceptable levels of person response validity were found and the scale was also able to distinguish between the abilities of the drivers with a person separation reliability of 0.90. The results indicate that P-Drive on-road is valid and reliable for producing a linear measure of driving ability in people with stroke, dementia and mild cognitive impairment, and has the potential to become a clinically useful assessment tool for on-road driving tests.

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  • Supplemental Notes:
    • Abstract reprinted with permission of Taylor & Francis.
  • Authors:
    • Patomella, Ann-Helen
    • Tham, Kerstin
    • Johansson, Kurt
    • Kottorp, Anders
  • Publication Date: 2010


  • English

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 86-93
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01340925
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 23 2011 8:13AM