Article

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.

Langue : ANGLAIS