In-group bias is favoring one's in-group over out-groups, as shown by Shelly thinking her cheerleading team is the best.
In-group bias refers to the tendency to favor one's in-group over out-groups. An example of in-group bias is demonstrated by C. Shelly, who believes her cheerleading team is better than any other school's team, showing preference for her in-group. This bias can lead to exclusion and preference for individuals who are similar to oneself.
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