KMID : 1144120120020030139
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Biomedical Engineering Letters 2012 Volume.2 No. 3 p.139 ~ p.146
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Mental workload and task engagement evaluation based on changes in electroencephalogram
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Rabbi Ahmed Fazle
Zony Abongwa de Leon Pablo Fazel-Rezai Reza
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Abstract
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Purpose: In this study, electroencephalogram (EEG) signals were used to assess subject¡¯s mental workload and task engagement level during a set of neurocognitive tasks in an experimental space suit.
Methods: EEG signals were collected using a wireless EEG system during two experimental conditions ? when subjects did/did not wear space suit. Brain state changes based on EEG changes were quantified and compared with the direct responses of the subjects for different tasks. In addition, a statistical test of significance on the computed EEG index for the two experimental conditions was performed.
Results: It was found that the spacesuit experiment introduced a greater mental workload where subject¡¯s stress levels were higher than control experiment. Results indicated significant differences in task engagement between the spacesuit and control experiments for most of the tasks.
Conclusions: The findings could be useful in monitoring astronaut¡¯s or human subject¡¯s cognitive performance in assuring safety as well as improving the performance.
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KEYWORD
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Electroencephalogram, Mental workload, Task engagement, Space suit
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