认知负载水平是否会影响易感性?
Christian P Janssen1, Iris Schutte1, J Leon Kenemans1
1Utrecht University, Experimental Psychology and Helmholtz Institute, the Netherlands.
概括
认知负载不会影响前部P3 (fP3) 与事件相关的潜在 (ERP) 对新鲜声音的敏感性. 相反,fP3受刺激呈现的影响,特别是当需要声响应时,无论任务的复杂性如何.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 心理生理学 心理生理学
背景情况:
- 前端P3 (fP3) 事件相关潜力 (ERP) 预测检测失败.
- 随着任务需求 (视觉,手动,认知) 的增加,fP3振幅下降.
- 根据理论,fP3反映了指导反应或对新兴刺激的敏感性.
研究的目的:
- 为了研究不同认知负载对前额P3 (fP3) ERP振幅的影响.
- 要确定通过动词生成任务操纵的认知负载是否会影响fP3索引的易感性.
- 区分认知负载与刺激呈现和响应要求对fP3.3的影响.
主要方法:
- 参与者被分配到"听并重复"或"听并生成"动词任务组.
- 通过让参与者听取名词,重复它或生成相关的动词来操纵认知负载.
- 额头P3 (fP3) ERP被测量为响应于在名词偏移后0或200毫秒呈现的探针刺激,使用一种新的矢量过程序来控制与新奇相关的消极性.
主要成果:
- 在名词重复和动词生成过程中,fP3的幅度降低了 (相对于没有名词的基线),但在简单的听力过程中却没有.
- 这种fP3的减少发生不论任务所造成的认知负载.
- 对fP3的影响在声音响应必要时是最明显的,独立于响应的复杂性.
结论:
- 认知负载似乎没有调节前端P3 (fP3) ERP索引的易感性.
- fP3指数敏感性主要受到刺激呈现的影响,特别是当声响应参与时.
- 认知任务的复杂性 (例如,动词生成与重复) 不会改变这种关系.
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