| Sumario: | Purpose: The aim of this study was to develop an Ethical Nursing Competence Self-rating Scale for Clinical Nurses. Methods: A scale-development study was applied that comprised eight stages of DeVellis. The scale verification involved a convenience sample of 423 nurses from September to October 2019 at three general hospitals located in Korea. The content validity, factorial structure validity, item-convergent/discriminant validity, known-group validity, convergent validity, internal consistency reliability, and test-retest reliability of the Ethical Nursing Competence Self-rating Scale for Clinical Nurses were evaluated. Data were analyzed using exploratory and confirmatory factor analyses, Pearson's correlation coefficient, Heterotrait-monotrait (HTMT), Cronbach's α, and intraclass correlation coefficient. Results: Exploratory and confirmatory factor analyses yielded five-factors. Known-group validity was demonstrated by clinical experience and nursing ethics education experience. Convergent validity was demonstrated using measures of defining issue. Internal consistency reliability and test-retest reliability were found to be acceptable, as indicated by a Cronbach's α of .70~.85 and an intraclass correlation coefficient of .72~.89. Conclusion: The Ethical Nursing Competence Self-rating Scale for Clinical Nurses is a new instrument that comprehensively measures the aspects of ethical behavior, ethical decision-making and action, ethical sensitivity, ethical reflection, and ethical knowledge. It consists of 20 items scored on a 4-point Likert scale. The validity and reliability of the scale were verified. These findings indicate that the instrument can be applied in clinical practice, nursing education, and research.
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