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

描述（由申请人提供）：拟议的研究将评估称为青年活动概况（雅普）的校准自我报告工具的可靠性和有效性，用于评估青年体力活动（PA）和久坐行为（SB）。在改进客观监测技术方面已经做了大量工作，但系统地使用校准程序为改进自我报告仪器在研究和公共卫生监测方面的效用提供了一种途径。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值相对应的估计值。这将使人们有可能获得准确的，群体水平的估计PA和SB使用较便宜的可行方法。初步校准的雅普表明，它可以产生准确的组估计PA和预测遵守既定的公共卫生准则PA。拟议的研究将在这项工作的基础上，通过校准和评估雅普的网络版本，使学校的节目和青年研究能够更广泛地采用。这三个独立的目标将使我们能够继续系统地改进这一有前途的公共卫生工具。在目标1中，我们将确定三个不同版本的雅普（印刷版、在线版和在线游戏版）的可靠性和等效性。我们会分两次（相隔1至2星期）在1 - 2间不同学校的完整教室（共36间教室）使用3个不同版本的测验，以检验两种不同形式的测验的重测信度和等值。在目标2中，我们将开发和测试新的校准算法，用于基于Web的雅普版本。数据将在两个地区不同的大都市学校系统（得梅因和达拉斯）的整个学年中使用在线版本（使用我们建立的协议）收集，以增加算法的通用性。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 2060 FITNESSSGRAM（R）伙伴关系项目）测试雅普计划网络版的有效性和等效性。将通过检查与FITNESSGRAM电池组的身体健康的组水平估计值的相关性来评估在线和在线游戏版本的结构有效性。将评价在线和在线游戏版本中PA的年龄和性别模式的等效性，如有必要，将使用测试等效步骤对游戏版本的输出进行标准化。拟议的研究将系统地评估基于网络的雅普的形式，以学校为基础的研究对PA和SB的效用。进一步完善，这些工具可以促进全国各地的青年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.