Skip Navigation LinksHome > March 2014 - Volume 37 - Issue 1 > Item-level factor analysis of the Self-Efficacy Scale
Text sizing:
International Journal of Rehabilitation Research:
doi: 10.1097/MRR.0000000000000030
Brief research report

Item-level factor analysis of the Self-Efficacy Scale

Bunketorp Käll, Lina

Collapse Box


This study explores the internal structure of the Self-Efficacy Scale (SES) using item response analysis. The SES was previously translated into Swedish and modified to encompass all types of pain, not exclusively back pain. Data on perceived self-efficacy in 47 patients with subacute whiplash-associated disorders were derived from a previously conducted randomized-controlled trial. The item-level factor analysis was carried out using a six-step procedure. To further study the item inter-relationships and to determine the underlying structure empirically, the 20 items of the SES were also subjected to principal component analysis with varimax rotation. The analyses showed two underlying factors, named ‘social activities’ and ‘physical activities’, with seven items loading on each factor. The remaining six items of the SES appeared to measure somewhat different constructs and need to be analysed further.

© 2014 Wolters Kluwer Health | Lippincott Williams & Wilkins


Article Tools


Article Level Metrics

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.