At Halloween we enjoy putting on costumes and masks. At work, we sometimes assume roles. Doing so can have two opposite effects. It can undermine engagement — or promote effectiveness. The natural tendency to adapt in order to “fit in” can undermine engagement if we do it unconsciously and lose authenticity. But we can consciously shift our approach (e.g., from feminine to masculine) in order to be more effective Shifting in the latter way is no more inauthentic than speaking a foreign language in order to be understood,.