Persuasive psychology is the psychology used to influence a person's attitudes or behavior without duress. A very famous theory in persuasive psychology is the Nudge Theory, which is a small change in the environment that can shape human behavior. There are many factors that can influence human behavior and choices. Negotiation is also part of persuasive psychology. An anchor is very important during the process of negotiation. This can lead to the discussion of whether we should give the first offer during a negotiation. Persuasive psychology is very important in life, the Nudge Theory is important to help people make the right decisions.