Dyke Ford B, Leiker Amber M, Grand Kirk F, Godwin Maurice M, Thompson Andrew G, Rietschel Jeremy C, McDonald Craig G, Miller Matthew W
School of Kinesiology, Auburn University, 301 Wire Road, Auburn, AL 36849, USA.
School of Kinesiology, Auburn University, 301 Wire Road, Auburn, AL 36849, USA.
Int J Psychophysiol. 2015 Jan;95(1):56-62. doi: 10.1016/j.ijpsycho.2014.12.008. Epub 2014 Dec 17.
We examined whether the utility of a recently developed auditory probe technique for indexing cognitive workload was dependent on the stimulus properties of the probes. EEG was recorded while participants played a videogame under various levels of cognitive workload. At each level of workload, participants were probed with one of four different types of auditory stimuli: novel complex, repeated complex, novel simple, or repeated simple sounds. Probe efficacy at indexing cognitive workload was assessed by determining which probes elicited ERP components that decreased monotonically as a function of workload. Results suggest that complex auditory stimuli were significantly more effective in indexing cognitive workload than simple stimuli. The efficacy of complex stimuli was due to their ability to elicit a robust orienting response, indexed by the early P3a component of the ERP, which decreased monotonically as a function of cognitive workload.
我们研究了一种最近开发的用于索引认知工作量的听觉探测技术的效用是否取决于探测刺激的特性。在参与者于不同认知工作量水平下玩电子游戏时记录脑电图。在每个工作量水平上，用四种不同类型的听觉刺激之一对参与者进行探测：新颖复杂、重复复杂、新颖简单或重复简单声音。通过确定哪些探测刺激引发随着工作量单调递减的事件相关电位（ERP）成分，来评估探测刺激在索引认知工作量方面的功效。结果表明，复杂听觉刺激在索引认知工作量方面比简单刺激显著更有效。复杂刺激的功效归因于它们引发强烈定向反应的能力，该定向反应由ERP的早期P3a成分索引，且随着认知工作量单调递减。
