High Quality Content by WIKIPEDIA articles! In psychology, an attribution bias or attributional bias is a cognitive bias that refers to the systematic errors made when people evaluate and/or try to find reasons for their own and others` behaviors. People constantly make attributions regarding the cause of their own and others’ behaviors; however, attributions do not always accurately mirror reality. Rather than operating as objective perceivers, people are prone to perceptual errors that lead to biased interpretations of their social world.