从解释偏向视角探讨共同内群体认同促进民族心理融合的认知加工过程。实验1和实验2设置群体情境（竞争/非竞争)，分别考察即时解释偏向（包含自动解释、迭代解释）和延时解释偏向在共同内群体认同与民族心理融合关系中的作用。结果发现，在竞争和非竞争情境下，共同内群体认同可以促进民族心理融合，其促进作用发生在自动积极解释和延时积极解释阶段。研究从认知加工的视角拓展了共同内群体认同模型，并完善了解释偏向阶段模型。

The study of the promoting effect of common in-group identity on ethnic psychological compatibility has great theoretical and practical value for creating a strong sense of Chinese nation community and strengthening the national integration. By constructing the common superior identity, common in-group identity weakens the inter-ethnic boundary and perceives non-ethnic groups as members of in-group, and thus the positive bias of in-group will be extended to non-ethnic groups. However, will it be possible to promote ethnic psychological compatibility by improving the positive interpretation bias of non-ethnic information? To reveal the cognitive process of common in-group identity’s promotion of ethnic psychological compatibility, two experiments were conducted to explored the mechanism of ethnic psychological compatibility promoted by common in-group identity from the perspective of interpretation bias. Studies have shown that in the absence of competition or conflict, common in-group identity can promote ethnic psychological compatibility. Whether common in-group identity can promote ethnic psychological compatibility in competitive situations remains to be further explored. Experiment 1 investigated the role of on-line interpretation bias in the relationship between common in-group identity and ethnic psychological compatibility in group competition situation. In this study, Zhuang and Miao college students (N=138) were recruited to create a group situation (with or without competition). Through re-categorizing the common in-group identity, and measured on-line interpretation bias (including automatic interpretation and iterative interpretation) and psychological compatibility. Experiment 2, the same participants and experimental paradigm were used to further explores the role of off-line interpretation bias in promoting ethnic psychological compatibility in common in-group identity. The results showed that: (1) The main effect of categorization strategy was significant, with significantly higher ethnic psychological compatibility in the common in-group group than in the independent group.The third-order interaction of categorization strategy, ethnic and situation was significant. In the competitive situation, for the Miao participants, ethnic psychological compatibility was significantly higher for the common in-group group than for the independent group; In the non-competitive condition, ethnic psychological compatibility in the group of common in-group group for Zhuang participants was significantly higher than that the separate group. (2) The mediating effect of automatic positive interpretation bias was significant. (3) The mediating effect of off-line positive interpretation bias was significant. The two experiments jointly proved that, in competitive and non-competitive contexts, common in-group identity can promote ethnic psychological compatibility, and its promotion effect happened at the stage of meaning activation of cognitive processing (automatic positive interpretation) and the post-interpretation of information (off-line positive interpretation). The study improves the stage model of interpretive bias and extends the common in-group identity model. In this study, interpretative bias is classified into three stages of cognitive processing: initial meaning activation of cognitive processing (automatic interpretation), meaning selection of information (iterative interpretation) and post interpretation of information (off-line interpretation), the stages of interpretative bias are refined. Common in-group identity promotes positive inter-group relations because it improves the automatic positive interpretation bias and off-line positive interpretation bias of external group information and expands the common in-group identity model from the perspective of cognitive processing.