IfADo - Leibniz Research Centre, for Working Environment and Human Factors, Ardeystr. 67, 44139 Dortmund, Germany.
IfADo - Leibniz Research Centre, for Working Environment and Human Factors, Ardeystr. 67, 44139 Dortmund, Germany.
Int J Psychophysiol. 2014 Jan;91(1):3-9. doi: 10.1016/j.ijpsycho.2013.10.006. Epub 2013 Oct 19.
In applied contexts, psychophysiological measures have a long tradition to evaluate the user state. EEG correlates that indicate mechanisms of information processing, however, are hardly accessible since discrete time stamps that are necessary for this approach are commonly not available in natural situations. However, eye blinks may close this gap. Eye blinks are assumed to mark distinct points in information processing, necessary to segment the incoming data stream. By using mobile EEG in a simulated working situation we demonstrate that eye-blink-related potentials provide reliable information about cognitive processing in distinct working environments. During cognitive tasks, an increase in the fronto-central N2 component as well as evoked theta activity can be shown, both indices of enhanced cognitive control. The posterior P3 is reduced during physical tasks (sorting of boxes), probably reflecting the more continuous nature of this task. The data are discussed within a model of dopaminergic modulation of blink activity that involves both task specific aspects like executive control and modulating influences of motivation or fatigue.
在应用情境中，心理生理学测量方法在评估用户状态方面有着悠久的传统。然而，用于评估信息处理机制的 EEG 相关指标却很难获得，因为这种方法通常需要离散的时间戳，但在自然情境中通常无法获得。然而，眼动眨眼可能会弥补这一空白。人们认为，眼动眨眼标志着信息处理中的不同点，这对于分割输入数据流是必要的。通过在模拟工作场景中使用移动 EEG，我们证明了与眼动眨眼相关的电位可以提供关于不同工作环境中认知处理的可靠信息。在认知任务中，可以显示出额中央 N2 成分和诱发的 theta 活动增加，这两者都是认知控制增强的指标。在后顶叶 P3 在身体任务（分拣盒子）期间减少，可能反映了这个任务更连续的性质。该数据在涉及执行控制等任务特定方面以及动机或疲劳的调节影响的 blink 活动的多巴胺调制模型中进行了讨论。
