A Basic Study on the Detection Method of Fatigue and Recovery during VDT Work

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Key Points

To identify effective indicators for detecting fatigue and recovery while working at visual display terminals (VDT).
Conducted a fatigue evaluation study with 14 students using mental arithmetic tasks during VDT work.
Utilized OpenFace facial analysis tool to gather indicators from head imagery during video tasks.
Statistically analyzed average values and time-series changes of the indicators at specific intervals during and after the tasks.
Confirmed the accumulation of fatigue and recovery effects through subjective assessment.
Identified potential effective indicators for detecting fatigue accumulation and recovery as time changes in head position and angles, average action units, and gaze deviations.

Basic study reveals methods to detect fatigue and recovery indicators in VDT work, suggesting new assessment techniques.

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Ryota OCHI (2026) studied this question.

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