在双任务步行过程中，测量不同任务需求下用于认知工作量评估的注意力储备和心理努力。
Measurement of attentional reserve and mental effort for cognitive workload assessment under various task demands during dual-task walking.
作者信息
Shaw Emma P, Rietschel Jeremy C, Hendershot Brad D, Pruziner Alison L, Miller Matthew W, Hatfield Bradley D, Gentili Rodolphe J
机构信息
Neuroscience and Cognitive Science Program, University of Maryland, College Park, MD, USA; Department of Kinesiology, School of Public Health, University of Maryland, College Park, MD, USA; Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD, USA.
Department of Kinesiology, School of Public Health, University of Maryland, College Park, MD, USA; Veteran's Health Administration, Baltimore, MD, USA.
出版信息
Biol Psychol. 2018 Apr;134:39-51. doi: 10.1016/j.biopsycho.2018.01.009. Epub 2018 Jan 31.
Previous work focused on cognitive workload assessment suggests EEG spectral content and component amplitudes of the event-related potential (ERP) waveform may index mental effort and attentional reserve, respectively. Although few studies have assessed attentional reserve and mental effort during upper-extremity performance, none have employed a combined approach to measure cognitive workload during locomotion. Therefore, by systematically considering ERPs, spectral content and importantly their combination, this study aimed to examine whether concurrent changes in spectral content and ERPs could collectively serve as an index of cognitive workload during locomotion. Specifically, ERP and EEG biomarkers were assessed as participants performed a cognitive task under two levels of difficulty (easy or hard) and two conditions (seated or walking). Changes in attentional reserve and mental effort appeared to collectively index cognitive workload under varying demands due to changes in task difficulty or performance conditions. This work can inform cognitive workload assessment in patient populations with gait deficiencies for future applications.
先前专注于认知工作量评估的研究表明，事件相关电位（ERP）波形的脑电图频谱内容和成分幅度可能分别指示心理努力和注意力储备。尽管很少有研究评估上肢运动期间的注意力储备和心理努力，但尚无研究采用综合方法来测量运动期间的认知工作量。因此，通过系统地考虑ERP、频谱内容以及重要的是它们的组合，本研究旨在检验频谱内容和ERP的同时变化是否能共同作为运动期间认知工作量的指标。具体而言，在参与者于两种难度水平（容易或困难）和两种条件（坐着或行走）下执行认知任务时，对ERP和脑电图生物标志物进行了评估。由于任务难度或执行条件的变化，注意力储备和心理努力的变化似乎共同指示了不同需求下的认知工作量。这项工作可为未来应用中步态缺陷患者群体的认知工作量评估提供参考。
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