Calibration of the Online Youth Activity Profile for School-Based Evaluations

描述(由申请者提供)：这项拟议的研究将评估一种名为青年活动概况(YAP)的校准自我报告工具的可靠性和有效性，以评估青年体育活动(PA)和久坐行为(SB)。为改进客观监测技术已做了大量工作，但有系统地使用校准程序提供了一种方法，可提高自我报告工具在研究和公共卫生监测方面的效用。通过适当的校准，可以将自我报告的PA和SB数据转换为与使用客观测量获得的更准确的值相对应的估计值。这将使人们有可能使用成本较低的可行方法获得对PA和SB的准确的、组水平的估计。YAP的初步校准表明，它可以产生对PA的准确群体估计，并预测PA是否符合既定的公共卫生指南。拟议的研究将在这项工作的基础上，校准和评估基于网络的YAP版本，使其能够在学校方案编制和青年研究中得到更广泛的采用。这三个独立的目标将使我们能够继续系统地改进这一前景看好的公共卫生工具。在目标1中，我们将确定YAP的三个不同版本(印刷、在线和在线游戏)的可靠性和等价性。我们将分两次(间隔1-2周)对来自12所不同学校的完整教室(共36个教室)进行3个不同版本的重测，以检查不同形式的重测的可靠性和等效性。在目标2中，我们将开发和测试新的校准算法，以用于基于网络的YAP版本。数据将通过在线版本(使用我们制定的协议)在两个地区不同的大都市学校系统(得梅因和达拉斯)收集整个学年的数据，以增加算法的普适性。在目标3中，我们将通过一个涉及1000多所学校的大型参与性研究网络(NFL Play 60 Fitnessgram(R)伙伴计划)来测试YAP的网络版本的有效性和等价性。将通过检查与Fitnessgram电池中对体能的团体水平估计的相关性来评估在线和在线游戏版本的结构效度。将评估在线和在线游戏版本中PA的年龄和性别模式是否相等，如有必要，游戏版本的输出将使用测试等值步骤进行标准化。拟议的研究将系统地评估YAP的网络格式对以学校为基础的PA和SB研究的效用。通过进一步改进，这些工具可以促进对全国各地青年PA和SB模式的系统评估。

DESCRIPTION (provided by applicant): The proposed study will evaluate the reliability and validity of a calibrated self-report instrument called the Youth Activity Profile (YAP) for assessig youth physical activity (PA) and sedentary behavior (SB). Considerable work has been done to improve objective monitoring techniques but the systematic use of calibration procedures provides a way to improve the utility of self- report instruments for research and public health surveillance. With appropriate calibration, it is possible to convert self-reported PA and SB data into estimates that correspond to more accurate values obtained using objective measures. This would make it possible to obtain accurate, group level estimates of PA and SB using less expensive feasible methods. Preliminary calibration of the YAP demonstrates that it can produce accurate group estimates of PA and predict compliance with established public health guidelines for PA. The proposed study will build on this work by calibrating and evaluating web-based versions of the YAP that will enable broader adoption in school based programming and youth research. The 3 independent aims will allow us to continue our systematic refinements of this promising public health tool. In Aim 1 we will determine the reliability and equivalence of th three different versions of the YAP (Print, Online, and Online Game). We will administer the 3 different versions to intact classrooms from 12 different schools (36 classrooms total) on two occasions (1-2 weeks apart) to examine the test-retest reliability and equivalence of the alternative formats. In Aim 2 we will develop and test new calibration algorithms for use with the web-based versions of the YAP. Data will be collected with the online version (using our established protocol) in two regionally distinct metropolitan school systems (Des Moines and Dallas) across a full academic school year to increase the generalizability of the algorithms. In Aim 3 we will test the validity and equivalence of the web-based versions of the YAP through a large participatory research network involving over 1000 schools (NFL PLAY 60 FITNESSGRAM(R) Partnership Project). Construct validity will be evaluated for both the Online and Online Game versions by examining correlations with group level estimates of physical fitness from the FITNESSGRAM battery. Age and gender patterns of PA from the Online and Online Game versions will be evaluated for equivalence and, if necessary, output from the Game version will be standardized using a test- equating step. The proposed study will systematically evaluate the utility of the web-based formats of the YAP for school-based research on PA and SB. With additional refinement, these tools can facilitate the systematic evaluation of youth PA and SB patterns across the country.