Social categorization is a labeling cue for identity in people's lives,and it is also a way for people to develop psychological identity.When individuals gain membership in a group,they tend to compare their in-group with out-group,identify positively with the group they belong to,and give more positive evaluations to in-group members.Common ingroup identity is the positive identification emotion that group members feel toward the new superior group after constructing a new superior group for members of different groups.It can produce positive effects such as promoting psychological integration,reducing intergroup prejudice,and increasing prosocial behavior.Yet,some studies have also found that the effects of common ingroup identity can be short-lived in the face of categorizations that have strong social identity significance(e.g.,race and religion).However,previous studies have mostly focused on the positive effects of common ingroup identity,its negative effects have been less addressed.Therefore,this paper summarizes the different effects of common ingroup identity from both positive and negative perspectives,explores the various factors that influence its role,and puts forward directions for future research on common ingroup identity in the context of Chinese ethnic groups.Common ingroup identity is the positive feeling of identification with a new group,which is the result of the process of reclassifying individuals who were previously viewed as members of different groups into a common and superior in-group identity.On the one hand,this reclassification of groups has been shown to be positive.It promotes intergroup psychological integration and thus,increases satisfaction with each other.It plays an important role in reducing intergroup prejudice and easing intergroup relations.It also increases prosocial and helping behaviors.On the other hand,common ingroup identity can also be negative.There is evidence that it can reduce trust,increase intergroup hostility and prejudice,and reduce prosocial behavior due to the emergence of superiority complexes.Based on the two diametrically opposite effects,and combined with some perspectives from ongoing research by related scholars in recent years,the key influences on shared in-group identity are further summarized:individual psychological attributes such as perceived similarity to different groups and motivation to form common ingroups,group attributes such as group size and group status,different situation types,and the methods of reclassification.Common in-group identity provides an important pathway for promoting positive interactions between groups,but it can have both positive and negative effects under different conditions.We need to further advance and explore the areas related to common ingroup identity in the future.We should repeatedly test the contradictory results of the common ingroup identity effect in the and explore the causes behind it.Future studies could explore the interaction of various factors to find the boundary point for different effects and could adopt a new reclassification method to study the important direction of the common group identity of the floating population in combination with the current realistic background.
common ingroup identityrecategorizationintergroup relationshippositive effectnegative effect
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