背景與目的：兒童的身體活動狀況可能會影響兒童的身心發展，但國內目前欠缺評估學齡前兒童身體活動的工具。本研究目的為發展以主要照顧者和學前教育教師代填之學齡前兒童身體活動日誌及探討其同時效度。方法：本研究徵召20位學齡前兒童配戴三軸加速規三天，同時受試兒童之學校教師或主要照顧者記錄受試兒童這三天的身體活動情形於日誌上。本研究以無母數分析探討活動日誌對三軸加速規的同時效度，也分別就兒童性別、發展、接受學前教育情形、和週間或週日測試時間等分組，進一步分析本活動日誌使用在兒童不同狀況時的同時效度。結果：本研究的學齡前兒童身體活動日誌之同時效度，在全體受試兒童之中高和修正式低強度活動時間的相關性，分別為r(下標 s)=0.61和r(下標 s)=0.77(p<0.01)；而在不同兒童性別、發展、接受學前教育、和測試時間等之相關性，也多數達中度以上相關(r(下標 s)=0.50~0.98, P<0.05)。結論：本研究的學齡前兒童身體活動日誌與三軸加速規的同時效度達中度顯著相關，為值得參考使用之評估工具。

Background and Purposes: Physical activity might affect development of children. But there is no assessment tool of the physical activity for preschoolers in Taiwan. The purpose of this study was to develop a proxy-report physical activity diary for preschoolers and to validate this physical activity assessment tool by a three-dimensuional accelerometer (RT3) in various children population and test time. Methods: Twenty preschool subjects (12 children were normal development and S children with developmental delay) were recruited in this study by convenience sampling method. Physical activity of each subject was recorded by primary caregivers or preschool teachers for three days (2 weekdays and 1 weekend) with the use of a physical activity diary and a three-dimensional accelerometer. Results: The Spearmen rank correlation coefficients between physical activity diary and RT3 data of the moderate to vigorous physical activity and the adjusted lower physical activity in all subjects were r(subscript s)=0.61 and r(subscript s)=0.77 (p<0.01), respectively. Significant moderate correlation (r=(subscript s)=0.50~0.98, p<0.05) was found between physical activity diary and RT3 data of most of moderate to vigorous physical activity and the adjusted low physical activity in various children population and test time, such as male versus females preschoolers, normal development versus developmental delay, with versus without attending schools, test time in weekday versus weekend. Conclusions: This proxy-report physical activity diary for preschoolers was validated with the use of a three-dimensional accelerometer.