Ethnocentric Bias (also known as ethnocentrism) occurs when perceptions of others are influenced by the culture of one's own ethnic group. It is looking at outgroups and judging them based on the norms and standards of one particular culture. A bias is a form of mental deception that alters our perceptions of the environment and other people. Ethnocentric bias influences how people perceive other cultures and individuals within that culture. One's perception of the world is greatly influenced by their particular ethnic or cultural group and an ethnocentric bias can occur when this influence alters perceptions of another group.