從系統功能語言觀點探討科學詞彙的歧義與解歧

本文旨以系統功能語言的主述位結構觀點探討國中階段科學文本詞彙歧義類型、詞頻分布、解歧詞彙及解歧語境類別，以「氫」一詞為例，利用AntConc軟體檢索106學年度三個版本國中教科書中含「氫」的語句，由三位科教學者進行詞彙歧義及語境類型之分析。研究發現國中科學文本中「氫」含有「氫元素」、「氫氣」、「氫原子」、「氫的元素符號」四種意義，在八年級科學文本中出現次數最高，歧義類型最多，特別是在元素與化合物、氧化還原反應等單元中。此外，在科學文本中「氫」有九種的解歧詞彙，其構成六種解歧語境類型。多數解歧語境屬同句主位及同句述位，其次是前句主位及前句述位，後句主位及後句述位最少，顯示閱讀解歧上可先從相同小句之主位及述位解讀歧義，其次回溯至先前小句主位及述位尋找解歧線索，最後才是後面小句的主位及述位。最後根據研究結果提出文本編輯、科學閱讀及後續研究等方面之建議。

關鍵字

系統功能語言；科學文本；科學語言；科學閱讀；詞彙歧義與解歧

並列摘要

This present study aimed to explore the lexical ambiguities and the disambiguation contexts via the example of ＂Hydrogen＂ in secondary school science textbooks from the lens of Systemic Function Linguistics by the corpus-based analysis technique. Total seventy sentences including the lexicon ＂hydrogen＂ were selected from the corpus of science textbooks by the software ＂AntConc,＂ and then these sentences were semantically categorized into various meanings and contexts by three science education experts. The results showed that ＂Hydrogen＂ in science textbooks could be referred to four ambiguities: ＂hydrogen element,＂＂hydrogen gases,＂＂hydrogen atom,＂ and ＂element symbol of hydrogen.＂ These ambiguities appear frequently in the science textbooks of eighth grade. Moreover, night types of disambiguated words could help readers distinguish the ambiguities of ＂hydrogen.＂ They could be further characterized into six disambiguation contexts. Among these contexts, ST and SR appear most frequently, while FT and FR follow, then BT and BR are the least, which indicated that these contexts could provide disambiguating tracks for readers to understand the precise semantics of hydrogen through their sequences and structures. Finally, the suggestions of the lexicon ambiguity and disambiguation are provided to the textbook writing, science reading, and future research.

並列關鍵字

Systemic Functional Linguistics ； Science Text ； the Language of Science ； Science Reading ； Lexicon Ambiguity and Disambiguation

參考文獻

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