What is a "Halo effect?" Review Later This bias occurs when decision makers seek out evidence that confirms their previously held beliefs, while discounting or diminishing the impact of evidence in support of differing conclusions. This is the overreliance on an initial single piece of information or experience to make subsequent judgments. Once an anchor is set, other judgments are made by adjusting away from that anchor, which can limit one’s ability to accurately interpret new, potentially relevant information. This is an observer’s overall impression of a person, company, brand, or product, and it influences the observer’s feelings and thoughts about that entity’s overall character or properties. It is the perception, for example, that if someone does well in a certain area, then they will automatically perform well at something else regardless of whether those tasks are related. This bias occurs when a person overestimates the reliability of their judgments. This can include the certainty one feels in her own ability, performance, level of control, or chance of success.