The investment model is a widely used theoretical framework in the study of close relationships. The model asserts that commitment is the outcome of relationship satisfaction, perceived investments, and perceived quality of alternatives. The current study sought to expand the scope of the investment model by including social network-based variables (specifically, network overlap and network uncertainty) as potential mediating entities. Results indicated that, when controlling for satisfaction, investment, and quality of alternatives, both network overlap and network uncertainty significantly and negatively relate to commitment. Tests of mediation revealed that both network uncertainty and network overlap partially mediated the associations shared by relationship satisfaction and investment with commitment, such that the positive relationships were significantly weakened. Results are discussed in theoretical and heuristic contexts.

中文翻译：

---

投资模型中网络重叠和网络不确定性的中介效应

投资模型是研究密切关系中广泛使用的理论框架。该模型断言，承诺是关系满意度、感知投资和感知替代品质量的结果。当前的研究试图通过将基于社交网络的变量（特别是网络重叠和网络不确定性）作为潜在的中介实体来扩大投资模型的范围。结果表明，在控制满意度、投资和替代品质量时，网络重叠和网络不确定性都与承诺显着负相关。中介测试表明，网络不确定性和网络重叠部分调节了关系满意度和投资与承诺共享的关联，从而显着削弱了积极的关系。结果在理论和启发式上下文中讨论。