And as a researcher you try to find correlation and causation. Because of some men in the past; Wihelm Wundt, Sigmund Freud and Hugo Munsterberg, their contributions are what brought us into modern psychology today. Although there are still some areas of the brain that remain unknown, the help of Wihlem Wundt, known for having owned the first experimental laboratory dedicated to psychology. He created this laboratory to study human behavior using scientific methods. In doing so, the brain is not seen as a mysterious and confusing organ, and it is now a growing field that yields many results that future researchers can build on. Then there is Sigmund Freud, who today established what we today call psychoanalysis. This perspective is a therapeutic technique that helps to understand the deeper meaning of an individual's action and how to overcome this obstacle. Hugo Munsterberg, the main initiator of what is today applied psychology and also forensic psychology. His work tested the validity of eyewitness accounts. From his experiences we know that witnesses cannot be trusted, due to bias, environmental issues and mental/physical health.