halo effect

plural halo effects

1. human sciencesA cognitive bias in which judgment of somebody's character is influenced by an overall impression of them.
2. advertisingThe situation where the consumer's attitudes or beliefs are influenced by association, for example by a related product or service.

   In general on this index BP gained most on the items featured in the advertising but there was a 'halo' effect on items not included. There was also a very small halo effect on the other two companies.

   1980, Advertising Magazine, volumes 63-69, page 13

   1 more example

   In both cases, they found that […] there was a halo effect (e.g., when a "low cholesterol" claim was made, consumers perceived other nutrients, such as fat, also to be at low levels when they were actually high). Andrews reported that these misleading halos were reduced only when the claims were accompanied by an evaluative disclosure […]

   2016, National Academies of Sciences, Engineering, and Medicine, Health and Medicine Division, Food and Nutrition Board, Food Literacy: How Do Communications and Marketing Impact Consumer Knowledge, Skills, and Behavior?, page 51