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任务唤起的脉冲波幅度跟踪认知负载.

Yuri G Pavlov1, Anastasia S Gashkova2, Dauren Kasanov2

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脉冲波振幅 (PWA) 有效地跟踪认知负载和过载,超过心率 (HR). 这种非侵入性测量方法是从光聚缩学 (PPG) 中获得的,它显示出在评估精神劳动时实际应用的巨大潜力.

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科学领域:

  • 心理生理学 心理生理学
  • 认知神经科学 认知神经科学
  • 人与计算机的交互

背景情况:

  • 认知负载显著影响要求高的任务中的表现.
  • 准确测量认知负载是必要的跨越研究和实际设置.
  • 像心率 (HR) 这样的现有指标可能缺乏对微妙认知状态的敏感性.

研究的目的:

  • 评估脉冲波幅度 (PWA) 作为认知负载和精神努力的敏感指标.
  • 为了比较PWA与心率 (HR) 的有效性,在记忆任务期间跟踪认知负载.
  • 探索PWA,HR,瞳孔膨胀和行为表现之间的关系.

主要方法:

  • 参与者 (N=78) 执行了一个数字跨度任务,具有不同的内存负载 (5,9,13位) 和一个控制任务.
  • 脉冲波幅度 (PWA) 通过光聚聚光学 (PPG) 测量.
  • 通过心电图 (ECG) 记录心率 (HR),并同时记录瞳孔膨胀.

主要成果:

  • 随着记忆负载的增加,PWA表现出显著的抑制,这表明对认知负载的敏感性.
  • 心率 (HR) 与任务难度没有显著变化.
  • 认知过载导致PWA模式的逆转,与瞳孔膨胀动态相关.

结论:

  • 脉冲波幅度 (PWA) 是比心率 (HR) 更敏感的心理生理学测量认知负载和过载.
  • 通过PPG进行非侵入性测量的PWA在各种应用中提供了评估认知负载的实际潜力.
  • 这些发现增强了对认知负载指标的理解,并支持PWA在监测精神努力中的实用性.