Abstract

Objective

This study tested effects of changes in the psychological constructs of the trans-contextual model (TCM) on changes in adolescents’ outside of school moderate-to-vigorous physical activity (PA) measured using self-report and accelerometer-based device.

Design

A three-wave longitudinal design was used. High school students (N = 331) completed measures of all the TCM constructs at Time1 and at Time2, five weeks apart. Self-reported PA behaviour was measured also at Time3, five weeks after Time2. PA was measured using accelerometer-based devices for seven days following Time1 and Time3 for a census week.

Results

A structural equation model using residual change scores revealed that perceived autonomy support from physical education (PE) teachers positively predicted autonomous motivation in PE. Autonomous motivation in PE positively predicted autonomous motivation in leisure time. Leisure-time autonomous motivation was positively and indirectly related to intention, mediated by attitude and perceived behavioural control. Intention positively predicted self-reported PA, and mediated the effect of autonomous motivation on self-reported PA. There were no effects on outside of school PA measured by accelerometer-based device.

Conclusions

Results provide qualified support for the TCM in the prediction of change in adolescents’ leisure-time autonomous motivation, intention, and self-reported PA, but not change in PA measured by accelerometer-based device.

中文翻译：

---

应用跨情境模型预测休闲时间体育活动的变化

摘要

客观的

本研究测试了跨情境模型 (TCM) 的心理结构变化对使用自我报告和基于加速度计的设备测量的青少年校外中度到剧烈体力活动 (PA) 变化的影响。

设计

使用了三波纵向设计。高中生 (N = 331) 在时间 1 和时间 2 完成了所有 TCM 结构的测量，时间间隔为 5 周。自我报告的 PA 行为也在 Time2 后五周的 Time3 进行测量。在人口普查周的时间 1 和时间 3 之后，使用基于加速度计的设备对 PA 进行了为期 7 天的测量。

结果

使用残差变化分数的结构方程模型显示，体育教师的自主支持积极预测体育中的自主动机。PE中的自主动机正向预测休闲时间的自主动机。休闲时间自主动机与意图呈正向和间接相关，由态度和感知行为控制介导。意图正向预测自我报告的PA，并介导自主动机对自我报告的PA的影响。通过基于加速度计的设备测量对校外 PA 没有影响。

结论

结果为 TCM 在预测青少年休闲时间自主动机、意图和自我报告的 PA 变化方面提供了合格的支持，但对基于加速度计的设备测量的 PA 变化没有任何影响。