Psychometric Testing of a Scale Measuring Preceptor Preparedness: The Cap-ExPresS Study.

Preceptors educate nursing students to practice as novice, generalist nurses. There are no instruments measuring preceptor preparedness. The purpose of this study was to psychometrically test the Capstone-Experience Preceptor Preparedness Scale (Cap-ExPresS™). A cross-sectional multi-site survey design was used. A convenience sample of 118 preceptors was recruited from four Midwest hospitals. Exploratory factor analysis supported a 22-item scale representing four factors demonstrating internal consistency reliability using Cronbach's alpha: total scale, 0.95, student-centeredness, 0.90, pedagogic competence, 0.90, clinical competence, 0.81, and nurse professionalism, 0.87. Test-retest reliability was adequate for clinical competence at 0.71, 0.50-0.61 for other scores. Some evidence of predictive validity was observed via regression. Psychometric testing supported the validity and reliability of inferences made about preceptor preparedness with Cap-ExPresS™ scores. Scale scores indicate preceptor learning needs, evaluate interventions influencing preceptor preparedness, and assist clinicians to develop best practices for preceptor preparedness.