Preventing communication errors is essential for ensuring safety in the work place in railways. This study describes the construction of a "Causal model of communication errors in the railways" from the analyses of accident reports and feedback on experience of communication errors. Through this model, it was found that certain methods, such as "talk-back," "confirmation talk" and "learning ambiguous expressions" were effective in preventing communication errors. A training method to teach these skills was proposed and its effectiveness was confirmed through experiments.

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To prevent decision-making errors through training and education, it is necessary to evaluate personal decision-making traits. Two decision-making tasks were developed which make it possible to identify individual differences in decision-making. A decision confirmation exercise was designed to assess the tendency to omit confirmation tasks, while a modified Iowa Gambling Task (work version IGT) was developed to estimate the degree of preference for short-term gains. The validity of these exercises was then tested using functional magnetic resonance imaging (fMRI).

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