A psychologist is a professional who specializes in investigating people’s behavior, their psychological problems or their personality traits. Research is also very important in the field of psychology. Psychologists emphasize some areas; such as: how we think, feel or act. The goal of all this is to help patients solve their problems, understand themselves better, and enjoy greater stability. Psychologists have deep knowledge about human behavior. This knowledge is essential when helping people in their change and transformation processes.