Mental fatigue measurement as application software on consumer devices

— Introducing reliable fatigue index to daily life —

Abstract

Monitoring mental fatigue is critical for traffic safety and health care. Various indexes of mental fatigue have been developed and used in the fields of ergonomics and industrial hygiene. One such index is the flicker-perception frequency threshold: the frequency at which the perception of flickering lights disappears for human observers. This index has a long history as a reliable indicator of mental fatigue in the laboratory setting. We have developed low-cost technologies for measuring mental fatigue objectively with widely available consumer devices such as personal computers and smartphones.