Confirmation bias in psychology means people tend to judge and choose things by known experience and information. This kind of thinking affects how we act, especially when others are around. People show different behaviors when someone is around. One common result is that people tend to be cheating to other people, not always because they are dishonest by nature, but often due to social influence. As an example, when there is a charity, you follow suit as others donate money, although you don't intend to do so. In this situation your mind is dominated by confirmation bias rather than personal judgement. Confirmation bias can also lead people to justify unethical behavior. In another experiment by a psychologist, you follow others' cheating because your mind is also led by confirmation bias, rather than ethic judgement. When people see others cheating without facing consequences, they are more likely to think cheating is acceptable. Their bias confirms the idea that "everyone does it," so it must be okay.