Abstract: Whether adult individuals could establish and maintain intimate relationship is directly related to their mental health levels. It is commonly known that persons’ experience derived from original family is determinant to their well-being when entering an intimate relationship in adulthood. Although research exploring such relationship is not uncommon, little evidence-based study explaining the mechanism for the impact of childhood experience in original family on intimate relationship quality exists. Co-dependence, a psychological tendency of individuals to indulge in dysfunctional relations, is a potentially important mediator connecting childhood experience in original family and quality of current intimate relationship. However, empirical studies on roles of co-dependence playing in intimate relationship are rare and further studies are needed. In order to explore influence of original family functioning on quality of intimate relationship and its mechanism of action, we constructed a moderated mediation model to examine mediating effect of co-dependence and moderating role of individual self-differentiation. Convenience sampling was adopted. 500 Chinese college students (180 men, mean age=21.22 years, SD=2.34), who had experienced or were experiencing intimate relationship, participated in the study with informed consent. They completed anonymous questionnaires including social demographic status, Family Adaptability and Cohesion Evaluation Scale II-Chinese Version (FACES II-CV; 30 items, two factors: Family Cohesion and Family Adaptability; α=.89),Chinese Codependency Assessment Tool (CCDAT; 58 items, five factors: Other Focus/Self Neglect, Low Self Worth, Medical Problems, Hiding Self and family of origin issues; α=.93), Differentiation of Self Inventory (DSI; 27 items, four factors: Emotional Reactivity, Emotional Cutoff, Fusion with Others and I-Position; α=.82),and the Quality of Relationship Index (QRI, 6 items; α=.91).The hypothesized moderated mediation model was tested using PROCESS macro in SPSS 22.0. Test method of Harman single factor was used to make sure that common method deviation didn’t exit in this study. Descriptive statistics, correlation analysis and regression analysis were used. The key findings were as follows: (1) Original family cohesion (β=.21,p<.001) or family adaptability (β=.20,p<.001) could significantly predict the quality of intimate relationship; (2)Not only did family cohesion or family adaptability have a directly predictive effect on the quality of intimate relationship, but also had an indirect influence through the mediator of co-dependency;(3)The mediating effect of co-dependency was regulated by self-differentiation. For lower levels of self-differentiation, the mediating effect was pronounced, for higher, the mediating effect was not pronounced. The results indicated that there was a close relationship between original family functioning and intimate relationship. Good family adaptability and cohesion can play demonstration roles for individuals in how to maintain a high-quality intimate relationship. Moreover, original family functioning also influenced intimate relationship through the mediator of co-dependency. Meanwhile, this indirect effect was moderated by self-differentiation. That is, quality of intimate relationship in individuals with high levels of self-differentiation would not be influenced by their family functioning. The results may help to expand study perspective of co-dependency and reveal the intermediate mechanism of family functioning on the quality of intimate relationship. The mediating effect of co-dependency and moderating role of self-differentiation in this study have certain enlightenment significance for establishing and maintaining intimate relationship. Convenience sampling was adopted. 500 Chinese college students (180men, mean age = 21.22 years, SD = 2.34), who had experienced or were experiencing intimate relationship, participated in the study with informed consent. They completedanonymous questionnaires including social demographic status, Family Adaptability and Cohesion Evaluation Scale II-Chinese Version (FACES II-CV; 30 items, two factors: Family Cohesion and Family Adaptability; α=0.89),Chinese Codependency Assessment Tool (CCDAT;58 items, five factors:Other Focus / Self Neglect, Low Self Worth, Medical Problems, Hiding Self and family of origin issues; α=0.93), Differentiation of Self Inventory (DSI; 27 items, four factors: Emotional Reactivity, Emotional Cutoff, Fusion with Others and I-Position; α=0.82),and the Quality of Relationship Index (QRI, 6 items; α=0.91).The hypothesized moderated mediation model was tested using PROCESS macro in SPSS 22.0. Test method of Harman single factor was used to make sure that common method deviation didn’t exit in this study. Descriptive statistics, correlation analysis and regression analysis were used. The key findings were as follows: (1) Original family cohesion(β = 0.21,p< 0.001)or family adaptability(β = 0.20,p< 0.001)could significantly predict the quality of intimate relationship; (2) Not only did family cohesionorfamily adaptabilityhave a directly predictive effect on the quality of intimate relationship,but also had an indirect influence through the mediator of co-dependency;(3) The mediating effect of co-dependencywas regulated by self-differentiation. For lower levels of self-differentiation, the mediating effect was pronounced, forhigher, the mediating effect was not pronounced. The results indicated that there was a close relationship between original family function and intimate relationship. Good family adaptability and cohesion canplay demonstration roles for individuals in how to maintain a high-quality intimate relationship. Moreover, original family function also influenced intimate relationship through the mediator of co-dependency. Meanwhile, this indirect effect was moderated by self-differentiation. That is, quality of intimate relationship in individuals with high levels of self-differentiation would not be influenced by their family function. The results may help to expand study perspective of co-dependency and reveal the intermediate mechanism of family function on the quality of intimate relationship. The mediating effect of co-dependency and moderating role of self-differentiation in this study have certain enlightenment significance for establishing and maintaining intimate relationship.

Key words: family function, co-dependency, intimate relationship, differentiation of self

摘要： 考察了原生家庭功能对亲密关系质量的影响，以及共依附和个体自我分化在其中的作用。采用家庭亲密度与适应性量表、中文共依附量表、自我分化量表、关系质量指数量表对500名大学生进行调查，结果发现：（1）家庭功能显著正向预测亲密关系质量；（2）共依附在家庭功能与亲密关系质量之间起部分中介作用；（3）共依附的中介效应受到自我分化的调节。因此，原生家庭功能对亲密关系质量的影响是一个有调节的中介效应。

关键词: 家庭功能, 共依附, 亲密关系, 自我分化