Halo effect, also known as prejudice effect, refers to that the observer makes a biased (positive or negative) evaluation of a person according to the characteristics of that person, and extends this evaluation to other aspects.
not halo effect?
When going out, her mother warned Xiao Min to pay attention to pickpockets on the bus. Xiao Min felt that everyone was like a pickpocket on the bus, so she held her bag tightly.