This study clarified the "ived experience" of autonomous career development by analyzing the life story of the worker who migrated from Japan to the United States based on dialogical constructionism. The worker chose work styles and jobs that fit her circumstances as rational choices and strategies guaranteed by the social context (norms and common sense) in the U.S. and achieved autonomous career development, which means the stability of life and realization of the life she wants. The findings of this study force us to reconsider the measures to achieve autonomous career development in Japan. In other words, to realize autonomous career development in Japan, it is essential not only to support the proactive efforts of individual workers but also to update the social context by deconstructing and reconstructing the norms and common sense of Japanese society.

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The purpose of this study was to evaluate the workers' skill levels quantitatively by biological measurement during performance of milling work. We evaluated the relationship between the workers' skill levels, the difficulty levels of the tasks, and the workers' nervous system activities, i.e., changes in oxyhemoglobin and deoxyhemoglobin in prefrontal cortex as central nervous system activities and LF/HF as autonomic nervous system activities. Subjects were divided into two groups, i.e., an expert group and an intermediate subject group. As a result, it was shown that there is a certain relationship between workers' skill levels, the difficulty level of the tasks and nervous system activities. In conclusion, there is a possibility that changes in nervous system activities can evaluate the workers' milling skill level quantitatively.

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