The research employed the definition of executive function (EF for short) , namely effects of inhibition, shifting and updating, proposed by Miyake and his research fellows, and the very definition confirmed by latent variable analysis. The paper discussed the effects of three subfunctions of EF on verbal fluency. The experimental results were as follows: As for phonemic fluency, terms production by initials showed a higher predictive validity than terms by character components, so it may be better representative of phonemic fluency in Chinese. Phonemic fluency was characterized with language-specific. The role of the subfunction of shifting and inhibition, in both phonemic fluency and semantic fluency tasks, was quite similar. Semantic fluency relied more on memory updating.%采用MIYAKE等提出的用潜变量分析法验证的执行功能的结构概念,分别探讨了执行功能的3个子成分(抑制功能、转换功能和刷新功能)对言语流畅性的影响作用.研究发现:相对于偏旁组字指标,声母组字作为音位流畅性的指标更为敏感,能更好地代表音位流畅性,音位流畅性具有语言特异性；抑制功能与转换功能在音位流畅性和语义流畅性任务中的参与程度相当,刷新功能对语义流畅性的影响较大.
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