改革开放四十年来，人口流动在促进中国社会变迁的同时也使原本稳固的人际关系日渐开放多变。个体的人际选择机会增多，关系的建立和结束变得灵活自由。作为重要的社会生态环境因素之一，关系流动性将促使个体采取特定的人际交往策略以寻求更好的适应，比如高关系流动的社会使得人际关系更加开放化和市场化，身处其中的人们将更为看重并展现自身的人际价值。近年来，我国婚恋领域呈现明显的市场化趋势，人们的择偶方式也日趋“明码标价”。本研究将此种择偶认知策略概念化为“择偶计算心态”，并认为这种将择偶问题当作数学问题进行量化和计算处理的认知模式是对于高关系流动社会环境的适应性表现。本研究即从社会生态心理学视角出发，探究关系流动性这一人际环境中的重要社会生态因素对人们择偶认知策略的影响，考察关系流动性是否会引起择偶计算心态及其心理机制。研究假设关系流动性将促发个体在择偶时对自己和他人两方面的计算心态，并探索性地认为人际关系市场化感知和交互主体工具化感知可作为上述关系中的中介机制。 通过3个研究检验假设。具体而言，研究1聚焦地区关系流动性与个体择偶计算心态的关系，使用宏观区域数据和网络大数据，以离婚结婚比作为地区关系流动性的指标，对相亲网站上个体自我介绍与择偶要求文本进行分析作为个体择偶计算心态的指标，结果发现地区关系流动性能够显著正向预测个体在相亲网站中表达出的对于自我和他人的择偶计算心态。研究2转到个体层面，采用问卷法测量个体感知到的关系流动性及择偶计算心态，结果再次验证二者之间的正相关关系，即个体感知到的环境中的关系流动性越高，择偶情境下对于自我和他人的计算心态就越强。研究3通过实验法启动关系流动性思维定势，创设不同关系流动性环境，进一步探讨关系流动性和择偶计算心态之间的因果关系及中介机制。研究3a针对自我的择偶计算心态展开研究，发现高关系流动性思维定势启动能够激发择偶时更强烈的自我计算心态，且人际关系市场化和交互主体工具化两种感知在其中发挥中介作用；研究3b则针对他人的择偶计算心态展开研究，发现高关系流动性思维定势启动同样也能提升择偶时对他人的计算心态，且人际关系市场化感知在其中起到中介作用。 本研究首次检验了关系流动性对择偶情境下自我展示及人际交往策略的作用，并探索了其心理机制。研究结果一方面可以在理论上拓展关于个体如何适应特定社会生态环境的认识，另一方面可以在实践上为理解社会转型期人们在择偶领域的心理和行为策略提供参考，对于相亲网站的用户体验提升也可给予一定建议。未来研究可探讨其他可能的心理机制并考察个人关系流动性与环境关系流动性的交互作用对择偶计算心态的影响，未来研究还可以进一步探讨关系流动性对择偶以外的其他人际交往情境中计算心态的影响。

With the proceeding of great social changes in China, the flow of population is increasing, and the interpersonal relationship in the society is becoming more mobile. Therefore, individuals have more choice and freedom in choosing, building and ending relationships. Different levels of relational mobility will urge people to adopt different interpersonal strategies. For instance, high relational mobility society, like an open market, encourages adaptive interpersonal strategies, such as valuing and showing their interpersonal value. Social changes also promote the marketization of the field of love and marriage in China and redirect people’s mating strategies. The calculative mindset of mate choice reflects the behavior pattern that contemporary people treat the issues of mate choice as a mathematical problem to quantify and calculate, including the attitude to others as well as to oneself，which is a cognitive strategy adapted to the market pricing relationship model. From the perspective of social ecological psychology, this study explored the influence of relational mobility, a kind of important socioecological factors in the interpersonal environment, on people’s cognitive strategy in mating, focusing on whether relational mobility can lead to calculative mindset in mate choice and what’s the psychological mechanism underlying. Based on these above, this study built hypothesis that relational mobility would lead to the increase of calculative mindset in mate choice, and suggested that the perception of marketization in interpersonal relationship and instrumentalization in interaction could be used as the mediating mechanism. To verify the hypothesis, three studies were conducted. In study 1, we combined the macro level and individual level, a large-scale sample data（N=87429）from 31 provinces across China, supported the positive link between regional relational mobility(regional divorce rate) and calculative mindset of mate choice on a dating site(analyzing the text of individual self-introduction and mate selection requirements on dating website). Study 2 explored the questions from the individual level by the method of questionnaire survey. The results showed that the perceived relational mobility in peoples’ current environment was positively correlated with the calculative mindset of mate choice about themselves and others. To exclude the influence of interference factors, study 3a and study 3b employed laboratory research to clear the causality by creating different mobility environments. We manipulated relational mobility and set an imaginary social background in laboratory settings. Study 3a found that the individuals in the high (vs. low) relational mobility group had stronger self-calculation mindset, and perception of marketization in interpersonal relationship and instrumentalization in interaction both played a mediation role in the process. Study 3b showed higher relational mobility induced a stronger sense of marketization in interpersonal relationship, which led to more calculative mindset towards others. Finally, we discussed several theoretical implications. This study is the first to examine the effect of relational mobility on self-presentation and interpersonal strategies in the context of mate selection, and to explore its psychological mechanism. On the one hand, the results can theoretically expand the understanding of individual adaptability to environment. In practice, the empirical results of the research can help to understand the psychological and behavioral strategies of people in the field of mate selection during the period of social transition and can be used as a reference for the prevention of user research on dating sites. Meanwhile, there are several limitation that awaiting discussion. One concerns the limitation of only examining dependent variables on dating market and an extensive work on other situation is expected. Another has to do with the exploring on different psychological mechanism. For future study, we can explore the interaction effect between personal relational mobility and environmental relational mobility.