言据性是指作者对所述命题信息的来源及可信性进行说明的语言表征,同时编码了作者对所述命题的态度评价和介入程度。以言据性的信度基准线为出发点,通过证素在词汇、句法等层面的具体表现,以及解读具体语篇语境中作者证素使用的语用策略,探讨语篇可信性的作者建构过程。通过分析发现,信息来源的主观性服务于作者语篇整体建构的需要,语篇的可信性是在作者对语篇言据性的语用调节和读者认知识解之间博弈所构建的信息域中游移,而作者在信度范围内对证素语用调节的合理性是影响语篇可信性的权重因子。证素作为言据性的语言标记,出现频率根据不同文体对语篇可信性的需求程度而变化。
Evidentiality is the linguistic representation encoding the source of the said proposition and indicating its credibility, and broadly defined, it also embodies the author’s assessment of information sources and involvement in the said proposition. This paper intends to explore how the author constructs text credibility by interpreting author’s pragmatic strategies in using lexical and sentential evidentials in specific texts according to the baseline of information reliability. The finding shows that the subjectivity of the source of information serve the author’s construction of the whole text, and therefore text credibility holds an unstable position in the territory moving according to the game between author’s pragmatic manipulation of text evidentiality and reader’s cognitive interpretation, and the rationality and appropriateness of author’s pragmatic adjustment of evidentials within the range of information reliability is weighted in determining text credibility. As linguistic markers of evidentiality in texts, the frequency of evidentials used in texts changes according to different styles’ need for credibility.
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