Abstract
Neuro-physiological measures especially EEG analysis is helpful to understand underlying mechanisms of mental fatigue during sustained mental work. In this research, a work-rest schedule containing mental calculation and music rest break was designed. Neuro-physiological measures were related with subjective evaluation and performance assessment. Individual EEG characteristics and common EEG features were analyzed. It is found that theta and alpha rhythm are highly related with concentration, alertness and drowsy during mental work. Faster EEG frequency bands reflect higher alertness level after taking a rest. Subjective evaluation and performance assessment support EEG findings. The results from subjective evidence and objective evidence indicate that a short break (e.g. 15 min per 2 hrs) in sustained mental work can counteract the accumulation of mental fatigue and improve work efficiency.
