Grounded in the trans-contextual model, the purpose of the present study was to examine the role of self-determined motivation in Physical Education (PE) on self-determined motivation in Physical Activity (PA), PA intention, and accelerometer-measured habitual PA behavior among high-school aged adolescents. A sample of 394 Spanish high-school students (211 males and 183 females; aged 12-16 years) participated in the present study. The outcome measure of PA was established using accelerometry, whereas motiva- tion toward PA and PE as well as PA intention were measured using validated questionnaires. Path analyses supported in part the central propositions of the trans-contextual model. Self-determined motivation in PE predicted the self-determined motivation in PA (β=.45, p<.001, R2=.26). Self-determined motivation in PA predicted PA intention (β=.51, p<.001, R2=.41). The predictive strength from PA intention to behavior was weak (β=.11, p=.011, R2=.21) with a statistically non-significant mediational model from self-determined motivation in PA via PA intention to PA behavior (β=.28, p=.231). This weak-to-non-significant relationship does not fully support the previous findings that have shown the feasibility of the trans-contextual model in charting the pathways from self-determined motivation in an educational context to behaviors in an out- of-school context.

中文翻译：

---

自我决定的体育动机对客观测量的习惯体育活动的影响

基于跨上下文模型，本研究的目的是研究体育中自我决定动机（PE）对体育活动中自我决定动机（PA），PA意图和加速度计测得的习惯性的作用。高中年龄段青少年的PA行为。394名西班牙高中学生（211名男性和183名女性； 12-16岁）的样本参加了本研究。PA的结局指标是通过加速度计确定的，而对PA和PE的动机以及对PA的意图则使用经过验证的问卷进行了衡量。路径分析部分支持了跨上下文模型的核心命题。PE中的自我决定动机预测了PA中的自我决定动机（β= .45，p <.001，R2 = .26）。PA的自我决定动机可预测PA的意图（β= .51，p <.001，R2 = .41）。从PA意图到行为的预测强度很弱（β= .11，p = .011，R2 = .21），从PA通过PA意图对PA行为的自我决定动机得出的统计学上无统计学意义的中介模型（β= .28，p = .231）。这种弱到非重要的关系并不能完全支持先前的发现，该发现表明跨上下文模型在绘制从教育环境中的自我决定动机到校外行为的路径的可行性方面的可行性。 。