Feedback is an essential tool for managing team cooperation. Feedback is a give and take where both can and must be learned. The importance of feedback for personality development was also recognized in the 1970s by social psychologists Joseph Luft and Harry Ingram. They developed the “Johari Window” which shows that self-perception and external perception differ. The Johari Window also says that through feedback, the “blind spot” can be reduced and the scope for action increased. Positive feedback usually leads to the stabilization and development of the addressed behavior. It clears the way for team-promoting behavioral changes.