Reliability and Validity of the Self-Efficacy Expectations and Outcome Expectations After Implantable Cardioverter Defibrillator Implantation Scales

Abstract

The purpose of this study was to assess the reliability and validity characteristics of two new scales that measure self-efficacy expectations (Self-Efficacy Expectations After Implantable Cardioverter Defibrillator Implantation Scale [SE-ICD]) and outcome expectations (Outcome Expectations After ICD Implantation Scale [OE-ICD]) in survivors (N = 168) of sudden cardiac arrest, all of whom received an ICD. Cronbach's α reliability demonstrated good internal consistency (SE-ICD α = .93 and OE-ICD α = .81). Correlations with other self-efficacy instruments (general self-efficacy and social self-efficacy) were consistently high. The instruments were responsive to change across time with effect sizes of .46 for SE-ICD and .26 for OE-ICD. These reliable, valid, and responsive instruments for measurement of self-efficacy expectations and outcome expectations after an ICD can be used in research and clinical settings. © 2007 Elsevier Inc. All rights reserved.