本研究目的在探討幸福感與工作績效關係之中介歷程，以擴張－積聚理論為基礎，同時從情感與認知雙重歷程提出工作滿足與自我效能為中介變數。本研究更明確主張幸福感會透過工作滿足間接影響到助人行為，而透過自我效能間接影響到任務績效。本研究採用問卷調查法搜集資料，由主管與員工分別對工作績效與幸福感、自我效能及工作滿足進行評量，搜集155 份主管與員工配對資料，共有155 位員工與61 位主管完成填答。本研究就預試與正式施測之結果，將幸福感區分為四個構面，分別為「快樂」、「生活滿意」、「生活意義」與「喜歡自己」。研究結果發現，幸福感中的快樂與生活滿意構面會透過工作滿足之中介效果，進而間接正向地影響助人行為。此外，幸福感中的快樂與生活意義構面則會透過自我效能之中介效果，進而間接地提升任務績效。

This study focuses on the effects of subjective well-being (SWB), examining the mediating processes in the relationships of SWB and job performance. Referencing to the broaden-and-build theory (Fredrickson, 2001, 2003), this study proposes job satisfaction and self-efficacy as the affect-driven and cognition-driven mediators to explain why SWB impacts helping behavior and task performance. There are 155 employees and 61 supervisors, totaling 155 dyads, responding to the survey. Results indicate that SWB is a multi-dimensional construct, with dimensions such as happiness, life satisfaction, life meaning, and loving oneself. Results also showed that happiness and life satisfaction were positively correlated to job satisfaction and then indirectly enhance helping behaviors. Results further reveal that self-efficacy mediates the relationships among happiness, life meaning and task performance.