Development of the Workplace Interpersonal Problems Scale for Care Workers (WIPS) and examination of its reliability and validity

INTRODUCTION: The turnover rate of care workers has remained high by global standards, with previous studies showing an association between workplace interpersonal relations and care worker turnover and turnover intentions. This study details the development of the Workplace Interpersonal Problems Scale for Care Workers (WIPS) and examines its reliability and validity according to the COSMIN guidelines. METHODS: A total of 476 care workers employed by elder care facilities participated in the study. This study examined the reliability and validity of the WIPS after its development. Reliability was evaluated using Cronbach's α, test reliability with the standard error of measurement, and test–retest reliability with the intraclass correlation coefficient. Content validity, construct validity, and structural validity were examined to evaluate validity. RESULTS: Both total and subscale scores of the WIPS had a Cronbach's α coefficient >0.75 and high test–retest reliability (intraclass correlation coefficient, 0.75). Content validity analysis showed the item-content validity index of ≥0.90 for all WIPS items, confirming 100% of the hypotheses for testing construct validity. Confirmatory factor analysis showed an acceptable fit for the hypothesized six-factor construct (CFI = 0.92, TLI = 0.91, RMSEA = 0.07, SRMR = 0.05). CONCLUSIONS: The WIPS was found to be a valid and reliable instrument. With the growth of the elderly population worldwide, we believe that the WIPS will be a useful quantitative measure to assess workplace interpersonal problems affecting care workers in various aspects.