Psychology is the scientific study of the mind and behavior in humans and non-humans. It is a multifaceted discipline that includes many sub-fields of study such as clinical, developmental, social, cognitive, neuroscience, and educational psychology. Psychologists examine the relationships between brain function and behavior, and they apply the scientific method to construct rigorous laboratory or field experiments to test hypotheses. Psychology can help people in their everyday lives by improving communication skills, relationships, and the ability to manage stress. It can also be used to make better decisions in school, healthcare, and work, and improve mental health and well-being.