There’s a scene in the movie Moneyball that wonderfully captures one of the most important hidden influences that affects our judgment and decision-making. The Oakland As manager, Billy Beane, is presiding at a meeting in which his scouts are discussing prospects they like. The discussion is heavy on references to looks, such as “he has a strong jaw”—as if that has any correlation at all to the real question: can he produce runs? Another does not like a prospect because he has an ugly girlfriend; it tells him the player lacks confidence.
This bias is called the halo effect, and it has a powerful influence on the success of your persuasive efforts. The halo effect means that we have a tendency to let a judgment of a particular trait affect our judgment of other unrelated traits. For example, attractive individuals also tend to be perceived by others as more competent or likeable.
Because of the halo effect, we may perceive individuals differently depending on...







