Mental Fatigue Scale, MFS

MFS contains 15 questions about common daily activities with 4 alternatives and were associated with "affective, cognitive and sensory symptoms". It also includes questions about sleep and daily variation of symptoms. This instrument uses a rating based on "intensity, frequency and duration"; the higher the score, the more severe the symptoms [49]. In this study, we used mild (10.5–14.5), moderate (15–20) and severe (>20) mental fatigue.
