In-group bias is a psychological phenomenon where individuals favor members of their own group over those in other groups. This bias can manifest in various ways, such as preferential treatment, positive evaluations, and increased trust towards in-group members. It often occurs in social, cultural, or organizational contexts, where people identify with a specific group, such as friends, family, or work colleagues. This bias can lead to discrimination against out-group members, resulting in negative stereotypes and social division. In-group bias is influenced by factors like shared experiences, common goals, and group identity, which strengthen the bond among group members and can create an "us versus them" mentality.