Knowlden Adam P
Department of Health Science, University of Alabama, Russell Hall 472, P.O. Box 870311, Tuscaloosa, AL 35487-0311, USA.
ISRN Obes. 2014 Jan 30;2014:567523. doi: 10.1155/2014/567523. eCollection 2014.
Pediatric obesity is a pertinent public health challenge. Child physical activity and screen time behaviors enacted within the context of the family and home environment are important determinants of pediatric obesity. The purpose of this study was to operationalize five, maternal-facilitated, social cognitive theory constructs for predicting physical activity and screen time behaviors in children. A secondary purpose was to elucidate the function of suppressor variables in the design and implementation of family- and home-based interventions seeking to prevent pediatric obesity. Instrumentation included face and content validity of the measurement tool by a panel of experts, test-retest reliability of the theoretical constructs, and predictive validity of the constructs through structural equation modeling. Physical activity and screen time were modeled separately according to the five selected social cognitive theory constructs. Data were collected from 224 mothers with children between four and six years of age. Specification indices indicated satisfactory fit for the final physical activity and screen time models. Through a series of four procedures, the structural models identified emotional coping and expectations as suppressor variables for self-efficacy. Suppressor variables can complement program design recommendations by providing a suggested ordering to construct integration within an intervention.
儿童肥胖是一项相关的公共卫生挑战。在家庭和家庭环境背景下的儿童身体活动和屏幕使用时间行为是儿童肥胖的重要决定因素。本研究的目的是将社会认知理论的五个由母亲促成的结构进行操作化，以预测儿童的身体活动和屏幕使用时间行为。第二个目的是阐明抑制变量在旨在预防儿童肥胖的家庭和家庭干预措施的设计和实施中的作用。测量工具包括由专家小组进行的测量工具的表面效度和内容效度、理论结构的重测信度，以及通过结构方程模型对结构的预测效度。根据选定的五个社会认知理论结构分别对身体活动和屏幕使用时间进行建模。数据收集自224名有4至6岁孩子的母亲。拟合指标表明最终的身体活动和屏幕使用时间模型拟合良好。通过一系列四个程序，结构模型将情绪应对和期望确定为自我效能的抑制变量。抑制变量可以通过提供干预中结构整合的建议顺序来补充项目设计建议。
