This document discusses psychology as a science and its history and branches. It summarizes that psychology aims to study phenomena like dreams, thoughts, and emotions scientifically by investigating causes of behaviors and developing theories. The document notes that psychology emerged as a formal science in the late 19th century with Wilhelm Wundt establishing the first psychology laboratory in 1879. It has continued developing over the 20th century. Psychology includes different branches that study behaviors experimentally or in applied settings like schools. The document also distinguishes psychologists, psychiatrists, and neurologists and their respective focuses.