Reliability and Validity of Nurses' Job Satisfaction Scale and Nurses' Professional Commitment

Purpose. The purpose of this study was to evaluate the reliability and validity of two instruments designed to measure job satisfaction among nurses. Methods. The participants comprised 360 nurses from two hospitals. The two instruments, the Nurses' Job Satisfaction Scale (NJSS) and the Nurses' Professional Commitment Scale (NPCS), were developed based on literature review and clinical experience to assess job satisfaction and professional commitment among nurses. The validity of each instrument was determined by measuring the content validity, construct validity, criterion validity and concurrent validity. Internal consistency reliability and test-retest reliability were also examined to estimate the stability of the scales. Results. The final version of the NJSS showed good internal consistency reliability (Cronbach's alpha=0.92) and test-retest reliability (Pearson's correlation=074). The construct validity of the NJSS was evaluated by factor analysis and four factors were revealed: relationship, benefit and promotion, job environment, and workload. Each item's discriminate power was over 0.9. The internal consistency reliability of the NPCS had a Cronbach's coefficient level of 0.91. Correlation of NPCS test-retest reliability was 0.91. The NPCS consists of three factors with 19 items: nursing professional compliance, involvement of nursing professionals and retention of nursing professionals. Each item's discriminate power was over 0.9. Conclusion. The NJSS and NPCS are valid and reliable instruments for evaluating nurses' job satisfaction and professional commitment in Taiwan.