中文摘要：

本研究基于调节定向理论，以476名有效被试的测量数据，从动机的作用与影响来解释特质自我控制与主观幸福感关系的争议。结果发现：尽管（1）特质自我控制与主观幸福感正相关；但（2）两者间，促进动机有部分中介作用，预防动机无显著中介作用；故（3）高自我控制者也未必有更高的主观幸福感。因此，动机是特质自我控制与主观幸福感间的重要中介因素，不同动机导向的作用是造成特质自我控制与主观幸福感关系争议的重要原因。

英文摘要：

The relationship between self-control and subjective well-being is far from conclusive. Some argue that self-control is positively correlated with subjective well-being because people who have a lot of self-control are more adaptive and more successful in their lives. Other scholars argue that people high in the trait of self-control may not be high in subjective well-being, as those people usually experience an emotional cost for the sake of rational purpose in their goal-attainment processes. Past research indicates that motivation is an important mediator in the relation between trait self-control and subjective well-being. According to the regulatory focus theory, there are two motivational orientations that lead people to utilize different methods to pursue their goals, resulting in distinct experiences. As such, the present study aims at exploring the role of the two motivational orientations in the relation between trait self-control and subjective well-being. The participants were college students who voluntarily took part in this research. They completed a package of questionnaires measuring their self-control, regulatory focus, positive and negative affect, and life satisfaction. The score of self-control, promotion motivation and prevention motivation were directly obtained from the measurement of the corresponding scales. The scores of subjective well-being were the sum of the z-scores of positive affect and negative affect （recode score）, as well as life satisfaction. The results showed that self-control was positively correlated with subjective well-being （fl = .64）, consistent with existing literature. Results also showed that both promotion motivation and prevention motivation were positively correlated with self-control and subjective well-being. We then analyzed the mediating effects of promotion and prevention motivation in the relation between self-control and subjective well-being. The results showed that （1） The correlation between self-control and subjective well-being was r