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This paper focuses on a principle in presenting safetyrelated message on the table for a chemistry experiment support system. It is important for students to acquire applied skills to conduct experiments without the system in the future, as well as avoiding a danger in front of them. . We conducted an eye-gaze analysis to find out the effect of spatial connectedness of a message to a hazardous object. The results suggest a design principle against the strength of spatial connectedness in terms of visual search range, possible reaction time and the number of interpretations against a presented message.

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