Final answer:
An in-group is the group that an individual feels she belongs to and believes it to be an integral part of who she is. It is often defined by a combination of social dimensions such as nationality, ethnicity, age, gender, education, income, religion, and political values.
Step-by-step explanation:
An in-group is the group that an individual feels she belongs to and believes it to be an integral part of who she is. It is often defined by a combination of social dimensions such as nationality, ethnicity, age, gender, education, income, religion, and political values. For example, a person's in-group could be their nationality and ethnicity or it could be based on their age, gender, education, and income. In some cases, religion and political values can also play a role in defining a person's in-group.