类别决策直觉加工的事件相关电位研究

The Implicit Neural Mechanism of Intuitive Decision Making:Evidence of ERPs

决策研究中亟待解决的问题之一就是直觉决策的心理机制,由于受到研究手段和技术的限制,直觉决策研究较少。但随着认知神经科学的发展,为研究直觉决策提供了新的范式。方法:研究中采用ERPs技术和改进的刺激流范式对直觉决策电生理机制进行了初探。结果:在刺激呈现后的200 ms左右出现了一个P2成分,非直觉决策ERPs波形有一个更大的正向偏移。在刺激呈现300 ms左右不同的电极位置出现了P3a成分,其潜伏期和平均波幅存在显著差异。直觉决策波幅更小,潜伏期更长。结论:直觉决策相比分析决策的神经机制更为复杂,而且这两种决策可能存在不同的神经机制。

The study aims to investigate intuitive decision making and its psychological mechanism,which is still a complicated problem for limitations of research methods and techniques.Fortunately with the development of cognitive neuroscience,new research paradigms of intuitive decision making have been emerged.Therefore the ERPs technique and a improved RSS paradigm have been adopted to explore the implicit neural mechanism of intuitive decision making.Owing to this the result shows that: 1) at about 200ms after stimulus onset occurring a P2 component,ERPs waveforms of indirect decision making have a greater positive offset;2) at about 300ms after stimulus onset occurring a P3a component,and the average latency and amplitude of intuitive decision making are totally different from those of indirect decision making,specifically speaking,intuitive decision making have smaller amplitude and longer average latency than indirect decision making.The conclusion is the neural mechanisms of intuitive decision making is more complicated than that of analytic decision making and there is a discrimination between them.