This study was aimed at developing tasks corresponding to six types of human error due to serious railway accidents. The types of human error have been classified by combination of two dimensions induced by a cognitive mechanism of human error. One is deficiency of attention, which includes deviation and saturation of attention, and the other is a failure of activation of procedural schema for action and decision, which includes inactivated correct schema, activated habituated incorrect schema, and activated efficient incorrect schema. Each of the five factors was configurated by psychological task; digits recitation task for deviation of attention, vigilance task for saturation of attention, prospective memory task for inactivated correct schema, Stroop task for activated habituated incorrect schema, and Stroop task after training of naming color by congruent stimulus task for activated efficient incorrect schema. Six human error tasks were assembled with these subordinate tasks.

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