halo effect`
Halo effect t refers to a cognitive bias whereby the perception of a particular trait is influenced by the perception of the former traits in a sequence of interpretation or something when we consider a person good (or bad) in one category, we are likely to make a similar evaluation in other categories. If you trust a person has some negative qualities, you're likely to infer that they also has other negative qualities. It is as if we cannot easily separate categories. It may also be connected with dissonance avoidance, as making them good at one thing and bad at another would make an overall evaluation (which we do anyway) difficult. According to empirical research by Edward Thorndike , in the 1920s, that when army officers were asked to rate their charges in terms of intelligence, physique, leadership and character, there was a high cross-correlation. Halo effect also involve in implicit personality theory by Harold Kelley's here the first traits we recognize in other people influence our interpretation and perception of later ones because of our expectations. Attractive people are often judged as having a more desirable personality and more skills than someone of average appearance. Thus, we see that celebrities are used to endorse products that they have no actual expertise in evaluating, and with which they may not even have any prior affiliation. there is an example like if someone wearing the black t-shirt, looks grisly, it does not mean he is a bad guy. (come to think of it, the same is true of some real bad guy.