意义的多模态构建——对一次PPT演示竞赛的语篇分析

How Is Meaning Construed Multimodally——A case study of a PowerPoint presentation contest

系统功能语言学的基本原则是从层次、功能、语境、语篇、语域、选择等视角研究语言，但是“无论怎样，我们对语义的研究还只是特定的和片面的”（Halliday，1994：xx）。这意味着语义学不能穷尽来自各种源头的意义，我们有必要开展介入性语篇分析，特别是与多模态化相结合的计算机介入的语篇分析。 本文利用2005年中国人民大学在澳大利亚文化节上的一次PPT演示竞赛，分析了23个参赛作品，认为今天PPT演示已是一种重要的信息传递工具，成为一种新的语类。 我们的分析表明：自然语言仍是表达意义的主要模态，PPT演示的力量在于图像和音响等模态的运用参与主题意义的表达；在讨论时，应区别PPT既是工具，又是语篇，又是语类的不同概念；对PPT演示的研究可推动社会符号学的研究。

The tenet of systemic-functional linguistics is the study of language from the perspective of level, function, context, text/discourse, register, choice, etc. However, ＂in one way or another semantic studies remain partial and specific, ＂ （Halliday, 1994：xx） This suggests semantics does not exhaust all the resources where meanings come from and that we should bring to the fore the study of Mediated Discourse Analysis （MDA） , particularly the study of Computer Mediated Discourse Analysis （CMDA） in conjunction with multimodality. Taking advantage of a PowerPoint presentation contest sponsored by Renmin University＇ s Australian Studies Centre as one of the events for its 2005 Australian Culture Festival in Beijing, we analyzed all the 23 PPT presentation texts.What interests us is that PowerPoint presentation has become a standard presentation tool in communication, and is accepted as a new genre. Through our analysis, we have found that natural language is still the chief mode of expressing meaning; the value of PPT presentation lies in its use of images and sound effects which also construe the thematic meaning, we should make a distinction of PPT as a tool, as a text, and as a genre, and, finally, the study of PPT presentation will contribute to the study of socio- semiotics.