Psychologists study the human mind and behavior through research and clinical work. There are several types of psychologists including clinical psychologists who work in hospitals and private practices providing counseling, developmental psychologists who specialize in behavior at different life stages, and industrial-organizational psychologists who work to improve productivity in the workplace. Becoming a psychologist requires a doctoral degree which takes 5-7 years of graduate study to complete after earning a bachelor's degree. While training is lengthy and expensive, psychology offers rewarding careers helping others and good financial compensation, with average yearly wages for psychologists being over $70,000.