Using the rating scale model to examine the psychometric properties of the self-efficacy scale for driver competence
2011 (English)In: European Journal of Psychological Assessment, ISSN 1015-5759, E-ISSN 2151-2426, Vol. 27, no 3, 164-170 p.Article in journal (Other (popular science, discussion, etc.)) Published
This study evaluated the psychometric properties of a self-report scale for assessing perceived driver competence, labeled the Self-Efficacy Scale for Driver Competence (SSDC), using item response theory analyses. Two samples of Swedish driving-license examinees (n = 795; n = 714) completed two versions of the SSDC that were parallel in content. Prior work, using classical test theory analyses, has provided support for the validity and reliability of scores from the SSDC. This study investigated the measurement precision, item hierarchy, and differential functioning for males and females of the items in the SSDC as well as how the rating scale functions. The results confirmed the previous findings; that the SSDC demonstrates sound psychometric properties. In addition, the findings showed that measurement precision could be increased by adding items that tap higher self-efficacy levels. Moreover, the rating scale can be improved by reducing the number of categories or by providing each category with a label.
Place, publisher, year, edition, pages
Hogrefe & Huber Publishers, 2011. Vol. 27, no 3, 164-170 p.
self-efficacy, driver competence, item response theory, assessment
IdentifiersURN: urn:nbn:se:umu:diva-39540OAI: oai:DiVA.org:umu-39540DiVA: diva2:393594