Reputation in Fallout: New Vegas is a measurement of how the different factions in the Mojave Wasteland perceive your character. It is affected by positive and negative deeds that affect the faction in question, such as completing quests or killing members, respectively. Certain types of clothing or armor carry a faction affiliation (e.g. NCR armor), allowing you to impersonate a member of the faction the clothing belongs to. Some characters in a faction (including officers, security guards, and dogs) can see through disguises and react to your true reputation.