Development of a Japanese Version of the Intrinsic Motivation Inventory, and Examination of its Applicability with Newly Appointed Municipal Public Health Nurses

Abstract

Objective: This study aimed to develop a Japanese version of the Intrinsic Motivation Inventory and examine its applicability to newly appointed municipal public health nurses.

Methods: Twenty-one items from three subscales of the core dimension of the Intrinsic Motivation Inventory were translated and back-translated. The content validity of the question items was confirmed by conducting a preliminary survey and discussions among researchers. Questionnaires were mailed to newly appointed public health nurses in 500 municipalities throughout Japan to collect data and perform factor analysis. We performed item, exploratory, and confirmatory factor analyses, and examined the known-group validity and reliability of the responses.

Results: A total of 324 responses were analyzed. In this analysis, nine items were deleted to obtain an optimal version of the survey with twelve items across three factors. The analysis showed that the Cronbach α was 0.86 overall, and 0.84 for the KMO (P<0.01). The goodness of fit of the model was RMSEA=0.09, GFI=0.91, AGFI=0.86, and CFI=0.94, and we determined that with these values together the results are largely acceptable.

Discussion: To some extent, the results verified the reliability and validity of the inventory. This suggests that the inventory can be helpful in certain settings, such as reflection, in the education of newly appointed public health nurses.