Dept. of Kinesiology, Iowa State University, Ames, IA, USA..
J Phys Act Health. 2011 Nov;8(8):1108-16. doi: 10.1123/jpah.8.8.1108.
The System for Observing Play and Leisure Activities (SOPLAY) is a direct observation instrument designed to assess group physical activity and environmental contexts. The purpose of this study was to test the convergent validity of the SOPLAY using temporally matched data from an accelerometry-based activity monitor.
Accelerometry-based physical activity data were obtained from 160 elementary school children from 9 after-school activity programs. SOPLAY coding was used to directly observe physical activity during these sessions. Analyses evaluated agreement between the monitored and observed physical activity behavior by comparing the percent of youth engaging in physical activity with the 2 assessments.
Agreement varied widely depending on the way the SOPLAY codes were interpreted. Estimates from SOPLAY were significantly higher than accelerometer PA levels when codes of walking and vigorous were used (in combination) to reflect participation in moderate to vigorous PA (MVPA). Estimates were similar when only SOPLAY codes of vigorous were used to define MVPA (Difference = 1.33 ± 22.06%).
SOPLAY codes of walking corresponded well with estimates of Light intensity PA. Observations provide valid indicators of MVPA if coding is based on the percentage of youth classified as "vigorous."
观察游戏和休闲活动系统（SOPLAY）是一种直接观察工具，旨在评估小组体育活动和环境背景。本研究的目的是使用基于加速度计的活动监测器的时间匹配数据来测试 SOPLAY 的收敛有效性。
从 9 个课后活动项目中的 160 名小学生中获得基于加速度计的体育活动数据。在这些会议期间，使用 SOPLAY 编码直接观察体育活动。通过比较监测和观察到的体育活动行为的百分比，分析评估了这两种评估方法之间的一致性。
根据 SOPLAY 代码的解释方式，一致性差异很大。当使用步行和剧烈代码（组合）来反映中等到剧烈体力活动（MVPA）时，SOPLAY 的估计值显著高于加速度计 PA 水平。当仅使用 SOPLAY 的剧烈代码来定义 MVPA 时，估计值相似（差异= 1.33 ± 22.06%）。
SOPLAY 的步行代码与轻度 PA 的估计值非常吻合。如果编码基于被归类为“剧烈”的青年的百分比，则观察结果是 MVPA 的有效指标。
