Ung Wei Chun, Meriaudeau Fabrice, Tang Tong Boon
Annu Int Conf IEEE Eng Med Biol Soc. 2018 Jul;2018:1522-1525. doi: 10.1109/EMBC.2018.8512501.
Gains of cognitive training may be eliminated due to mental fatigue. This paper reports the design and implementation of a functional near-infrared spectroscopy (fNIRS) - dynamic difficulty adjustment (DDA) system. A total of 25 healthy volunteers underwent two training sessions - one with fixed difficulty level of training (FDT) and one with neurofeedback training (NFT) using our fNIRS-DDA system. The workload in each training session was assessed using the National Aeronautics and Space Administration Task Load Index (NASA-TLX). Whilst sustaining mental task performance, the drop in oxygenation level observed in NFT subjects might indicate mental fatigue as they received higher NASA-TLX scores, especially in both mental demand and frustration subscales. In contrast, the oxygenation levels remained almost constant by NFT subjects throughout the experiment. This suggests that the proposed fNIRS-DDA system aided the participants in avoiding mental fatigue. Future studies will investigate if the system may prevent the progression of Alzheimer's disease.
认知训练的效果可能会因精神疲劳而消除。本文报告了一种功能近红外光谱（fNIRS）-动态难度调整（DDA）系统的设计与实施。共有25名健康志愿者参加了两次训练课程——一次是固定难度水平训练（FDT），另一次是使用我们的fNIRS-DDA系统进行神经反馈训练（NFT）。每次训练课程的工作量使用美国国家航空航天局任务负荷指数（NASA-TLX）进行评估。在维持心理任务表现的同时，NFT组受试者观察到的氧合水平下降可能表明他们存在精神疲劳，因为他们的NASA-TLX得分更高，尤其是在心理需求和挫折感子量表上。相比之下，NFT组受试者在整个实验过程中氧合水平几乎保持不变。这表明所提出的fNIRS-DDA系统有助于参与者避免精神疲劳。未来的研究将调查该系统是否可以预防阿尔茨海默病的进展。
