框架效应决策任务中专家知觉的ERPs研究

Event-related Potentials Studies of Expert Perception in Framing Effect Decision-making Task

目的探究框架效应决策任务中的专家知觉事件相关电位特征。方法以框架效应决策任务作为实验材料,选取专家-新手范式,分析某高校30名被试的行为学数据与ERPs数据。结果专家的决策时间短于新手,更少受到框架效应的影响;刺激呈现早期,专家的N2波幅显著大于新手,潜伏期更早;刺激呈现晚期,专家诱发的P3波幅显著大于新手,潜伏期更早。结论在框架效应决策任务中,专家知觉能够帮助专家在决策的早期快速地提取、整合长时记忆存储的信息,占用更少的认知资源;在刺激呈现的晚期,通过对动机、注意力以及自信心的提升来优化决策结果。

Objective To explore the Event - related Potentials of experts perception in framing effect of decision - making task. Methods 30 subjects were classified as experts and novices to take part into a decision - making task. Record the amplitudes and latency of event - related potentials. Results Experts made decisions faster than novices and less affected by framing effect. In the early stimulation of the experimental task, experts evoked higher am- plitude of N2 than novices; the latency of N2 in experts is earlier than novices. In the late stimulation of the task,ex- perts also evoked higher amplitude of P3, and the latency of P3 is earlier than novices. Conclusion In framing effect of decision - making task, the expert perception can help experts to accelerate memory retrieval, information integration and occupy fewer cognitive resources at the beginning of the decision - making. In the late stimulation of the task, the perception also helps experts to stay focus, enhance their self - confidence, and provide them an intense motivation.