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Validation of scales measuring self-efficacy and outcome expectancy in evidence-based practice

Chang, Anne M. & Crowe, Linda (2011) Validation of scales measuring self-efficacy and outcome expectancy in evidence-based practice. Worldviews on Evidence-Based Nursing, 8(2), pp. 106-115.

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Abstract

Background: Evidence-based practice (EBP) is embraced internationally as an ideal approach to improve patient outcomes and provide cost-effective care. However, despite the support for and apparent benefits of evidence-based practice, it has been shown to be complex and difficult to incorporate into the clinical setting. Research exploring implementation of evidence-based practice has highlighted many internal and external barriers including clinicians’ lack of knowledge and confidence to integrate EBP into their day-to-day work. Nurses in particular often feel ill-equipped with little confidence to find, appraise and implement evidence.

Aims: The following study aimed to undertake preliminary testing of the psychometric properties of tools that measure nurses’ self-efficacy and outcome expectancy in regard to evidence-based practice.

Methods: A survey design was utilised in which nurses who had either completed an EBP unit or were randomly selected from a major tertiary referral hospital in Brisbane, Australia were sent two newly developed tools: 1) Self-efficacy in Evidence-Based Practice (SE-EBP) scale and 2) Outcome Expectancy for Evidence-Based Practice (OE-EBP) scale.

Results: Principal Axis Factoring found three factors with eigenvalues above one for the SE-EBP explaining 73% of the variance and one factor for the OE-EBP scale explaining 82% of the variance. Cronbach’s alpha for SE-EBP, three SE-EBP factors and OE-EBP were all >.91 suggesting some item redundancy. The SE-EBP was able to distinguish between those with no prior exposure to EBP and those who completed an introductory EBP unit.

Conclusions: While further investigation of the validity of these tools is needed, preliminary testing indicates that the SE-EBP and OE-EBP scales are valid and reliable instruments for measuring health professionals’ confidence in the process and the outcomes of basing their practice on evidence.

Impact and interest:

6 citations in Scopus
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4 citations in Web of Science®

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ID Code: 52295
Item Type: Journal Article
Keywords: Evidence-Based Practice, Self-Efficacy, Outcome Expectancy, Instrument Validation
DOI: 10.1111/j.1741-6787.2011.00215.x
ISSN: 1545-102X
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > NURSING (111000)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2011 Sigma Theta Tau International
Copyright Statement: This is the accepted version of the following article: Chang, A. M. and Crowe, L. (2011), Validation of Scales Measuring Self-Efficacy and Outcome Expectancy in Evidence-Based Practice. Worldviews on Evidence-Based Nursing, 8: 106–115. doi: 10.1111/j.1741-6787.2011.00215.x, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/j.1741-6787.2011.00215.x/abstract
Deposited On: 19 Jul 2012 06:29
Last Modified: 29 Jan 2015 00:47

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