本文藉由PIRLS2011資料，分析學生課外閱讀時間、借閱圖書頻率和閱讀成績、閱讀興趣、動機，以及對閱讀自我評價的關係。研究發現，學校和家中藏書量與學生閱讀成績有關係。而願意花時間閱讀、會到學校圖書館或公共圖書館借書的學生，不論成績屬低分組或高分組，在閱讀興趣、閱讀動機以及閱讀自我評價分數上都比較好。這顯示提供學生足夠圖書和閱讀時間是會促進學生的閱讀力。

This research analyzed the association among number of books at home, size of school library, time spend after school reading and students like reading, students motivated to read, students confident in reading, and reading achievement scores from PIRLS 2011 data. The outcomes support a positive relation among all variables. 4th grade students who spend more after school reading time and who borrowed more books from library had higher achievement scores and were more positive and confident about reading. We conclude that reading time and reading volume facilitate children's reading ability.