词汇共现频率视角下语义联想效应及其神经机制

词汇识别与记忆受到词汇之间语义联想关系的影响。鉴于自由联想方法建立词汇语义联想关系的局限性, 研究者们提出用共现联想法建立词汇之间的语义联想关系。本文对词汇共现频率视角下的语义联想效应及其神经机制的研究进行分析发现, 语义联想的丰富程度和关联程度影响词汇的加工; 与少语义联想词相比, 多语义联想词导致P200波幅增大和N400波幅减小; 语义联想加工涉及的脑区主要是额上回和左内侧颞叶区域。未来研究需要探讨自由联想法和共现联想法建立语义联想关系的差异, 基于共现联想法进一步地探究语义联想的行为规律和神经机制, 并从共现联想的角度开展汉语语义联想效应及神经机制的研究。

Semantic association effect and its neural mechanism from the perspective of lexical co-occurrence frequency

Word recognition and memory are influenced by the semantic associative relationship between words.The free association method has some limitations in establishing lexical semantic associations.Researchers have proposed a new method called co-occurrence association.This study analyzed the semantic association effect and its neural mechanism from the perspective of lexical co-occurrence frequency.The results showed that the number and intensity of semantic association influenced the processing of words.Words with a large number of semantic associations led to an increase in the amplitude of P200 and a decrease in the amplitude of N400.The brain regions involved in semantic association processing are mainly the superior frontal gyrus and the left medial temporal lobe.Future research should discuss the differences between free and co-occurrence association in establishing a semantic association.Based on co-occurrence association,the behavioral characteristics and neural mechanisms of semantic association are further explored.Research on the semantic association effect and neural mechanism from the perspective of co-occurrence association is recommended.