You can combine the following strategies in various ways to lessen intergroup bias:
Boost understanding of the problem. You may, for instance, describe ingroups and outgroups, the reasons why people form them, and the ways in which they can affect people's attitudes and behavior.
Boost your desire to change. You may, for instance, describe how intergroup bias can be detrimental both generally and in the present situation.
Search for shared items between the groupings. Try to identify traits or challenges that both groups' members have in common.
Establish a collective group identity. You may, for instance, encourage people to forge a group identity that is shared by both their ingroup and outgroup while yet preserving the unique characteristics of each subgroup.
List the advantages of the outgroup. For instance, look for qualities in the outgroup that you admire.
Describe the ingroup's shortcomings. For instance, look for characteristics within the ingroup that you would find objectionable in outgroup members.
Think about how diverse the outgroup is. Try to distinguish the differences between the outgroup members, for instance, especially when it comes to characteristics that are thought to be archetypal of the outgroup.
Establish a collective group identity. You may, for instance, encourage people to forge a group identity that is shared by both their ingroup and outgroup while yet preserving the unique characteristics of each subgroup.
List the advantages of the outgroup. For instance, look for qualities in the outgroup that you admire.
Describe the ingroup's shortcomings. For instance, look for characteristics within the ingroup that you would find objectionable in outgroup members.
Think about how diverse the outgroup is. Try to distinguish the differences between the outgroup members, for instance, especially when it comes to characteristics that are thought to be archetypal of the outgroup.
Feel for the people in the minority. For instance, think about how your actions may make members of the outgroup feel, as well as how you would feel if someone acted in the same way toward you.
Find out what members of the outgroup think. Ask a member of the minority group, for instance, to describe their beliefs to you.
Boost communication among group members. The ingroup bias can be lessened by interactions, ongoing contact, and supportive relationships between groups. These ties can take many different forms, including actual friendships, collaboration in particular circumstances, knowledge that an ingroup member is closely associated with an outgroup member, and even hypothetical contacts with outgroup members.