Validity and Reliability Evidence for a New Measure: The Evidence-Based Practice Knowledge Assessment in Nursing

Background: Studies of evidence-based practice (EBP) among nurses often focus on attitudes and beliefs about EBP and self-reported EBP knowledge. Because knowledge self-assessments can be highly inaccurate, the authors developed and tested a new objective measure of EBP knowledge—the Evidence-Based...

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Bibliographic Details
Published inThe Journal of nursing education Vol. 54; no. 11; pp. 605 - 613
Main Authors Spurlock, Darrell, Wonder, Amy Hagedorn
Format Journal Article
LanguageEnglish
Published United States SLACK INCORPORATED 01.11.2015
Subjects
Adult
Competence
Delphi Technique
Education, Nursing
Educational Attainment
Educational evaluation
Educational Measurement
Evidence Based Practice
Evidence-Based Nursing
Female
Health Occupations
Humans
Institutional Evaluation
Leadership Effectiveness
Male
Measurement Techniques
Medical Students
Meta Analysis
Nurses
Nursing education
Nursing Research
Psychometrics
Reproducibility of Results
Self-Assessment
Validity
United States > US
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ISSN0148-4834
1938-2421
1938-2421
DOI10.3928/01484834-20151016-01

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Summary:Background: Studies of evidence-based practice (EBP) among nurses often focus on attitudes and beliefs about EBP and self-reported EBP knowledge. Because knowledge self-assessments can be highly inaccurate, the authors developed and tested a new objective measure of EBP knowledge—the Evidence-Based Practice Knowledge Assessment in Nursing (EKAN). Method: Seven subject matter experts reviewed candidate items, resulting in a scale content validity index of 0.94. Rasch modeling was used to evaluate item–person performance on the proposed unidimensional trait of EBP knowledge. The candidate item pool was then tested among 200 undergraduate nursing students. Results: Strong evidence of unidimensionality was confirmed by narrow item infit statistics centering on 1.0. The item separation index was 7.05, and the person separation index was 1.66. Item reliability was 0.98, and person reliability was 0.66. Conclusion: The 20-item EKAN showed strong psychometric properties for an instrument developed under the Rasch model and is available for use in research and educational contexts. [The 20-item EKAN showed strong psychometric properties for an instrument developed under the Rasch model and is available for use in research and educational contexts. [ J Nurs Educ. 2015;54(11):605–613.]
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ISSN:0148-4834
1938-2421
1938-2421
DOI:10.3928/01484834-20151016-01