If you join a teacher fraternity and choose to dress like most of the others in your group, you are exhibiting—

Conformity refers to the act of matching attitudes, beliefs, and behaviors to group norms. When a person adopts the dress code of a group voluntarily to fit in with most members, they are demonstrating conformity. Conformity differs from obedience (following direct orders from authority) and compliance (agreeing to a specific request). While group identity may be a related concept, the act of dressing like others specifically demonstrates conformity to group norms.