Give an example of how stereotyping can create perceptual distortion?

Stereotyping can create perceptual distortion by instilling a preconceived notion before the opportunity for objective, unbiased analysis of a person or situation. For example, the assumption that every black youth is a criminal or that every Muslim hates Christians causes the person to judge each individual in these groups before actually seeing or meeting them, effectively eliminating the chance for an objective and unbiased perception.