Psychology is used everyday to influence behaviors like getting children to eat or getting others to do tasks. It is the scientific study of mental processes and behavior. There are four main goals of psychology: describe, explain, predict, and influence behavior. Psychologists study both normal everyday behaviors and abnormal behaviors to understand what causes problems and how to diagnose them. There are ongoing debates in psychology around issues of stability vs change, continuity vs discontinuity, and nature vs nurture. Other sciences like biology, anthropology, and sociology are also relevant to understanding human behavior.