Clinical Rehabilitation

 

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Clinical Rehabilitation, Vol. 21, No. 1, 56-61 (2007)
DOI: 10.1177/0269215506071284

Development of the Adelaide Driving Self-Efficacy Scale

Stacey George

Michael Clark

Maria Crotty

Flinders University Department of Rehabilitation and Aged Care, Repatriation General Hospital, Daw Park, South Australia

Objective: To describe the development of the Adelaide Driving Self-Efficacy Scale (ADSES) and to report on its reliability and validity.

Methods: A set of 12 driving behaviours, developed through literature review, clinical experience and expert review, were rated for self-efficacy using a Likert scale. Internal consistency was investigated using a Cronbach's alpha coefficient and construct validity by comparing ADSES scores of stroke and non-stroke drivers. Criterion-related validity was examined by comparing ADSES scores with the result on a standardized on-road assessment.

Setting: A rehabilitation hospital in Adelaide, South Australia.

Participants: Staff from the hospital and stroke patients from the rehabilitation unit. Data from a non-stroke sample (n -/ 79) and stroke patients (n -/ 81) were used to test internal consistency and construct validity. A separate group of 45 people recommended for a driving assessment, of whom 34 were stroke patients, were used to test criterion validity.

Results: Cronbach's alpha coefficient was 0.98, indicating high internal consistency. The non-stroke and stroke groups showed significant differences in ADSES scores (t(158)-/ 5.5, P B < 0.05), demonstrating construct validity. Differences in ADSES scores for those participants who passed or failed the on-road assessment were significant for both the entire driving assessment group (t(43)-/ 3.2, P B < 0.05) and the stroke subgroup (t(43)-/ 3.2, P B < 0.05), indicating criterion validity.

Conclusion: The ADSES has demonstrated internal consistency and construct validity with the stroke and non-stroke population. The scale demonstrated criterion validity in its relationship with outcome of an on-road driving assessment. It appears to be a reliable and valid measure of driving self-efficacy.


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