Social psychological research on the process of expansion and shrinking of self-others boundary

首先，运用经济学的方法，我们试图建立一个可以解释社会依赖如何在机构之间广泛传播的模型。通过这种方法，揭示了一个初等线性代数模型可以描述我们与他人之间相互作用的边界变化。其次，分析了群内-群外情境的影响过程。采用调查与实验相结合的多相检验方法，揭示了内群体和外群体地位的可变性程度影响着内群体中个体边界的可变性。第三，大规模调查结果显示，在独立性和差异性上都认识自己的个体排斥他人的倾向较低。然后，通过纵向调查研究了自我-他者同一性的增加与自我和自我-他者关系评价的关系。结果表明，低自尊的人往往会因为把高自尊的朋友纳入自己而感到抑郁。此外，研究还表明，自我与朋友之间的同一性增加会降低对支持交换互惠性的敏感性。此外，为了探索网络传播的边界调节机制，通过问卷调查分析了手机短信交换的效果。结果表明，短信息交换具有弱纽带的作用，具有关系调节机制。

First, using a methodology of economics, we tried to make a model which can explain how social dependency among agencies spread widely. Through this approach, it was revealed that an elementary linear algebraic model can describe the change of the boundary through interactive relationship between ourselves and others. Second, the influence process of ingroup-outgroup context was analysed. Through multiphasic examination using methodology of surveys and experiments, it was revealed that the level of changeability of status of ingroup and outgroup affects changeability of boundary of individuals at ingroup. Third, the results of large-scale survey showed that individuals who recognize themselves highly in both independence and differentiation have a low tendency to exclude others.And then, a longitudinal survey examined the relationship between increment of self-other oneness and appraisal of self and self-other relationship. The result showed that low self-esteem people often experience depression through including high self-esteem friends into themselves. Furthermore, it was suggested that increment of oneness between self and friends decreases sensitivity to reciprocity of supports exchanged. Moreover, in order to explore the boundary regulation mechanism of cyber communication, the effects of exchange of short messages by a cellphone were analyzed through a questionnaire survey. Results,showed that the exchange of short messages functions as the weak ties, and has a relationship regulation mechanism.