How do our minds influence the way we behave? How do our bodies and minds work together? Do we have free will? Exploring and explaining the big ideas and groundbreaking theories in the field of psychology in a clear and simple way, The Psychology Book answers these questions and more besides, and is the perfect introduction to the subject. Untangling knotty theories and shedding light on abstract concepts, entries unpack each complex idea with a combination of easy-to-follow explanations and innovative graphics. Delve into the history of psychology, from its roots in philosophy right up to modern studies of autism and psychiatry across all of the key fields of study, from psychotherapy to cognitive psychology and behaviourism. And discover the groundbreaking ideas of great thinkers, from Sigmund Freud and Carl Jung to Noam Chomsky and Daniel Kahneman, along the way. Fully revised and updated with eight brand-new pages of content, The Psychology Book is an essential and accessible introduction to a fascinating subject.