Development of the Japanese version of the Ex Post I-Deals Scale

This study aimed to develop a Japanese version of the idiosyncratic deals (i-deals) scale. Rosen et al.’s (2013) Ex Post I-Deals Scale was translated into Japanese. Its factor structure, internal consistency, convergent validity, discriminant validity, and test-retest reliability were examined in a sample of full-time employees living in the Tokyo Metropolitan area. Data were collected at two time points (n=1,201 and n=849 for the first and second time points, respectively). A confirmatory factor analysis showed the bestfit indices for the Japanese version of the i-deals scale with the original fourfactor structure. Internal consistency, convergent validity, discriminant validity, and test-retest reliability were confirmed by calculating coefficient alpha, the correlation coefficient between the Japanese i-deals scale and LMX and organizational commitment, and the correlation coefficients of the data between two time points, respectively. Results revealed that the Japanese i-deals scale had sufficient reliability and validity. This study facilitates the measurement of i-deals in the Japanese population by adapting and validating the Ex Post I-Deals Scale.