The Greek letter Psi is the symbol for the field of psychology. The letter resembles an English capital "U" with a straight line cutting vertically through the center, extending beyond the top and bottom of the "U."
Though its beginnings are traced back to ancient philosophers, modern psychology is a scientific field that uses established research methods to collect evidence. Psychologists do not necessarily look at humans in the same way. The emphasis is often different. Typically, psychologists are interested in how behavior, learning, cognition, society or the unconscious mind interacts in the lives of people. Many modern psychologists believe that combinations of these factors are responsible for the lives people lead.