Behavioral economics
Behavioral economics is a smaller part of economics that combines what we know about psychology with what we know about economics. Normally, economics does not consider the way humans actually think, but instead, simplifies decision-making to make economic models easier to understand. However, this is not a complete picture of how the world, and economics, really works.  Normally, economists assume people are rational, meaning they make good decisions at the right times using all information. In real life, people do not do this. They are subject to problems with self-control, problems with time, and make different choices depending on how decisions are presented to them. Behavioral economists look at the world given problems and limitations that result when real humans are faced with decisions.