As a psychologist you try to understand human behavior. As a designer you try to do the same. The only difference is that after observing and studying behavior you don’t just write down your findings, you go one step further. Once you understand the behavior of the user you have to come up with a solution to change that behavior with your product. Not an easy task at all. To get a better understanding of user behavior I collect here all articles and videos that might help you design better products.