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Evidence-Based Practice Self-efficacy Scale: Preliminary Reliability and Validity


doi: 10.1097/NUR.0b013e3181aae8c6
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Purpose: This study examined reliability and validity of the researcher-developed 17-item Evidence-Based Practice Self-efficacy (EBPSE) scale.

Design: A quasi-experimental, pretest/posttest design with comparison group was applied.

Setting: Setting included inpatient, ambulatory, long-term care, and hospice units from a large US academic medical center and affiliated sites (n = 14).

Sample: Two cohorts of staff (26%) and leadership nurses (74%) participated in a 1-year educational program on clinical informatics and evidence-based practice (EBP) (cohort 1, n = 53, 2007-2008; cohort 2, n = 40, 2008-2009).

Methods: The EBPSE scale involves a 1% to 100% response scale, with higher scores indicating greater self-efficacy. Both cohorts completed the EBPSE scale at baseline (time 1) and after the clinical informatics content (time 2); cohort 1 also completed the scale at program completion after delivery of EBP content (time 3). Analysis included descriptive and inferential statistics.

Findings: Missing data ranged from 10% to 17% for participants at time 2 and 43% for cohort 1 at time 3. Cronbach α coefficients ranged from .95 to .98 across time and cohorts. Baseline and time 2 average EBPSE scale scores did not differ between cohorts. Average scores increased significantly (P < .01) from time 1 to time 2 (all participants) and time 2 to time 3 (cohort 1).

Conclusions: Findings suggest promise for the EBPSE scale as a measure of EBPSE and target for practice improvements. Further study is needed with a larger small sample and less attrition.

Implications: The EBPSE scale may foster leading EBP and mentoring nursing staff.

Author Affiliations: Department of Nursing, Mayo Clinic, Rochester, Minnesota.

The authors acknowledge the NQF Scholars Program faculty members; Dr. Marcy Harris for her contributions to scale item development; Dr. Julie Ponto for assisting with literature review; and the Mayo Clinic for funding the NQF Scholars Program.

Financial disclosure: No funding has been received for this work from any organization.

Corresponding author: Sharon J. Tucker, PhD, RN, Nursing Research and Evidence-Based Practice Division, Department of Nursing, Mayo Clinic, 200 First St, SW, Rochester, MN 55905 (

© 2009 Lippincott Williams & Wilkins, Inc.