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South African Journal of Occupational Therapy

On-line version ISSN 2310-3833
Print version ISSN 0038-2337


SWANEPOEL, Lizette; CLASSEN, Sherrilene  and  GOLIATH, Charlyn. Validity of the Stellenbosch University On-road Assessment. S. Afr. j. occup. ther. [online]. 2015, vol.45, n.3, pp.9-15. ISSN 2310-3833.

BACKGROUND: Internationally, occupational therapists are the professional group called upon to assess fitness to drive. Fitness to drive is assessed through a comprehensive driving evaluation consisting of a clinical battery of tests and an on-road assessment. The on-road assessment is the criterion standard for assessing fitness to drive. Such an assessment has not yet been developed or validated in the South African context. PURPOSE: This study empirically quantified the face, content and construct validity of the Stellenbosch University on-road assessment. METHODS: Firstly face validity was established using feedback from peer reviewers, secondly, content validity using the ratings of expert reviewers, and thirdly construct validity was established by assessing between group differences in young drivers who drove the road-course. RESULTS: Peer review indicated acceptable face validity. Expert reviewers had an average rater agreement percentage of 94%, indicating favourable content validity. One (of two) on-road outcome measures, the Global Rating Score, discriminated between two groups of drivers, indicating construct validity. CONCLUSION: This study introduced the first empirical on-road assessment in the South African context. The findings provided foundational information for occupational therapists interested in assessing in-traffic fitness to drive abilities. Implications for practice, research and policy were discussed.

Keywords : Fitness to drive; Measurement; South Africa.

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