The University of Georgia, Athens, GA, USA.
J Pediatr Psychol. 2013 Jun;38(5):563-76. doi: 10.1093/jpepsy/jst013. Epub 2013 Mar 4.
Scales used to measure selected social-cognitive beliefs and motives for physical activity were tested among boys and girls.
Covariance modeling was applied to responses obtained from large multi-ethnic samples of students in the fifth and sixth grades.
Theoretically and statistically sound models were developed, supporting the factorial validity of the scales in all groups. Multi-group longitudinal invariance was confirmed between boys and girls, overweight and normal weight students, and non-Hispanic black and white children. The construct validity of the scales was supported by hypothesized convergent and discriminant relationships within a measurement model that included correlations with physical activity (MET • min/day) measured by an accelerometer.
Scores from the scales provide valid assessments of selected beliefs and motives that are putative mediators of change in physical activity among boys and girls, as they begin the understudied transition from the fifth grade into middle school, when physical activity naturally declines.
测试用于测量身体活动的特定社会认知信念和动机的量表在男孩和女孩中的适用性。
采用协方差建模,对来自五年级和六年级多民族学生的大样本数据进行分析。
为所有组别的量表建立了理论和统计学上合理的模型,支持了其因子有效性。在男孩和女孩、超重和正常体重学生以及非西班牙裔黑人和白人儿童之间,证实了多组纵向不变性。在包括与加速度计测量的身体活动(MET•min/天)相关的相关性的测量模型中,假设的收敛和判别关系支持了量表的结构有效性。
这些量表的得分提供了对特定信念和动机的有效评估,这些信念和动机是男孩和女孩身体活动变化的中介因素,因为他们开始从五年级进入中学,这是身体活动自然下降的研究不足的过渡阶段。