<aside> ℹ️ The Halo Effect says that any one element in a user's experience with a company will rub off on their interpretation of other elements and their feelings about the company as a whole. Good design in one part of a website will make people like other parts better (and like the company better), but the opposite is also true.
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The halo effect is a well documented social-psychology phenomenon that causes people to be biased in their judgments by transferring their feelings about one attribute of something to other, unrelated, attributes.
For example, a tall or good-looking person will be perceived as being intelligent and trustworthy, even though there is no logical reason to believe that height or looks correlate with smarts and honesty.
The term "halo effect" (a.k.a. halo error) was first introduced into psychological-research circles in 1920 in a paper authored by Edward Thorndike titled “A Constant Error in Psychological Ratings.” Through empirical research, Thorndike found that when people were asked to assess others based on a series of traits, a negative perception of any one trait would drag down all the other trait scores.
A negative halo effect is sometimes called the "devil effect" or the "pitchfork effect," but that seems to be taking the metaphor too far. We recommend using the term "halo effect" for both positive and negative biases.
https://www.youtube.com/watch/kaCnQw_bYtw
Definition and Impact on Web User Experience