计算机辅助词汇完型填空题设计

计算机辅助 词汇完型填空题设计梁茂成中国外语教育研究中心

主要内容 • 教学中的材料选择 • 文本难度的测量 • WordNet 简介 • Cloze Mate —— 软件设计思路 • 软件演示及启示

教学中的材料选择 • 教学需“因材施教”； • “因材施教”即“量体裁衣”： • Tailored input; • Tailored instruction; • Tailored assessment; • Tailored feedback.

教学中的材料选择 • Tailored input: text difficulty control • Tailored assessment: • Computer-provided choices for cloze test gaps • User-confirmed choices (interactive) • Syllabus-based vocabulary control • Computer-generated format

文本难度的测量 • Readability indices • Gunning Fog Index • Smog • Coleman Liau • Flesch Reading Ease • …… • The Lexile Coefficient

文本难度的测量 • Developed by MetaMetrics • The Lexile Framework is the most widely adopted reading metric. It measures students’ reading ability and text difficulty on a common scale. • Lexile measures are powerful tools for linking assessment with instruction across the curriculum.

文本难度的测量 • Lexile measures provide a thermometer for measuring students’ reading abilities that talented educators, involved parents and motivated students use to improve learning. • Lexile measures tie day-to-day work in the classroom to critical high-stakes tests. The Lexile Framework offers a “big picture” view of growth of student reading ability from preschool through graduate school.

文本难度的测量 • Unfortunately, a lexile score can range from below 200L (even below 0) for beginning readers to above 1700L for advanced readers. It is not very intelligible to the user. • We have developed an algorithm (embedded in a program), which can convert raw lexile scores to standardized lexile scores on the 0-10 scale.

文本难度的测量 • Some pilot studies we have conducted indicate that the standardized lexile scores are not only easier to understand, but also as effective as the raw lexile scores.

WordNet 简介 • WordNet is a large lexical database of English, in which words are grouped into sets of synonyms called synsets, each expressing a distinct concept. Synsets are interlinked by means of conceptual-semantic and lexical relations. • WordNet is a useful tool for computational linguistics and natural language processing.

WordNet 简介

Cloze Mate —— 软件设计思路 • 工具： • WordNet • TreeTagger

Cloze Mate —— 软件设计思路 • Cloze中的选项： • 语义相关干扰项； • 形式相关干扰项。 • As the gas is radiated with great force, it ____ the rocket in the opposite direction. • A. attracts B. leads C. pulls D. pushes • Impressive and complex ____ it may appear, the rocket is a relatively simple device. • A. that B. so C. as D. though

Cloze Mate —— 软件设计思路 • 语义相关干扰项：利用WordNet中的语义查询，找到语义相关词的若干个备选词；根据词性提供备选词的适当形式。 • 形式相关干扰项：利用词性标注工具对文本进行标注，从底表中提取所选词的所有不同形式备选； • 用户可自定义。

软件演示及启示 • 选择难度适中的文本； • 选中target word； • 激活备选词； • 必要时添加用户自定义选项； • 预览； • 生成。

谢谢

计算机辅助 词汇完型填空题设计