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Definition of Halo effect
1. Noun. A cognitive bias in which judgment of somebody's character is influenced by an overall impression of him or her. ¹
¹ Source: wiktionary.com
Medical Definition of Halo effect
1. The effect (usually beneficial) that the manner, attention, and caring of a provider have on a patient during a medical encounter, regardless of what medical procedure or services the encounter involves, the influence upon an observation of the observer's perception of the characteristics of the individual observed (other than the characteristics under study) or the influence of the observer's recollection or knowledge of findings on a previous occasion. (05 Mar 2000)