Library and Information Science

Library and Information Science ISSN: 2435-8495
三田図書館・情報学会 Mita Society for Library and Information Science
〒108‒8345 東京都港区三田2‒15‒45 慶應義塾大学文学部図書館・情報学専攻内 c/o Keio University, 2-15-45 Mita, Minato-ku, Tokyo 108-8345, Japan
Library and Information Science 65: 1-35 (2011)

原著論文Original Article

健康医学情報を伝える日本語テキストのリーダビリティの改善とその評価一般市民向け疾病説明テキストの読みやすさと内容理解のしやすさの改善実験Improvement and evaluation of readability of Japanese health information texts: An experiment on the ease of reading and understanding written texts on disease

慶應義塾大学信濃町メディアセンターShinanomachi Media Center, Keio University ◇ 〒160-8582 東京都新宿区信濃町35番地 ◇ Shinanomachi 35, Shinjuku-ku, Tokyo 160-8582, Japan

受付日:2010年8月11日Received: August 11, 2010
受理日:2011年4月19日Accepted: April 19, 2011
発行日:2011年6月30日Published: June 30, 2011



【結果】構文的要素を改善し,語彙的改善として医学・医療用語に解説をかっこで補記し,テキスト構造を簡易な方法で改善したテキストAは,内容理解テストの平均スコアはオリジナルテキストより高かったが,読みの所要時間は長かった。構文的要素を改善し,医学・医療用語を一般的な用語や表現に置き換え,テキスト構造を入念に改善したテキストBは,読みの所要時間は短縮されたが,内容理解テストの平均スコアはオリジナルテキストと変わらなかった。また,本人に罹患経験があると所要時間が有意に短かった。これらの結果から,1)構文的改善は読みやすい印象を与えるが,他の要素の改善と対立が生じることがある,2)医学・医療用語の改善は自然な置き換えや文中での説明の補足が望ましい,3)テキスト構造は,今回の改善・評価方法では問題が多くその効果は明らかではない,4)読み手としての人の特性を考慮した評価が必要である, 5)内容理解を正確に測定する選択肢問題の作成に課題があることが確認された。

Purpose: The present study comprehensively examined ways of improving and evaluating the readability of Japanese health information texts.

Methods: The author assessed the improvement and evaluation of a text written by a medical doctor for patients and the general public regarding chronic suppurative otitis media. First, two different Japanese texts were prepared according to three differing readability factors (syntax, vocabulary, and text structure) and the differences between the three texts including the original were verified. Second, 91 college students were assigned one of the three texts and asked to answer a web survey. Readability was assessed using the time taken to read the text, and comprehension was assessed by a multiple-choice test. Comments on the readability of the text were also collected.

Results: Modified Text A with explanations of medical terms in parentheses was more understandable but more difficult to read. Modified Text B, which replaced medical terms with general vocabulary and consolidated the text structure, was more readable but less understandable. Experience of the disease affected the readability. The following conclusions were drawn: 1) syntactic factors contributed to the impression of ease of reading, but conflicted with other factors; 2) medical vocabulary should be replaced with general vocabulary or accompanied by explanations in phrases; 3) the effect of the text’s structure on comprehension was not clear due to the problems of improvement and evaluation methods; 4) some human factors should be considered when making the evaluation; and 5) valid comprehension tests are challenging.

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