This study takes the approach of EEG analysis by FFT to discuss the correlation between EEG and the workload during the Kraepelin test. Calculating the C
α /C
β, which is the content ratio of the power for the α-wave bands and the β-wave bands, was applied to compare the workload in the number of answers for the handedness, men and women. The analysis results revealed that, for the right-handed men, the number of answers had the correlation with C
α/C
β in the left hemisphere in the brain, however no correlation with C
α/C
β in the right hemisphere were found. On the other hand, for the both-handed men and the right-handed women, the number of answers had the correlation with C
α/C
β in both the left and the right hemispheres.
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