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[Comparison of railway employees and college students as evaluator of vibration discomfort].

Typically, vibration discomfort of railway cars was studied with railway employees as evaluator, because of their availability and interest, as well as various study requirements. However, it has not been shown that employees are appropriate for the task. In this study, railway employees were compared with college students in order to find how their ratings compared with those by ordinary passengers. An experiment was conducted in a running train, and 41 persons participated; about a half were railway employees and the other college students who were invited as non-specialists. Their task was to rate vibration discomfort on a scale of 1 to 4, continuously at an interval of 5 seconds. Results indicated that employee ratings showed smaller individual differences and in general were more cautious than the student ratings.