Psychology As A Science 1 An influential science The many branches of psychology that exist today cover the whole spectrum of mental life and human and animal behavior. The overall scope has extended to overlap with many other disciplines, including medicine, physiology, neuroscience, computer science, education, sociology, anthropology, and even politics, economics, and the law. Psychology has become perhaps the most diverse of sciences. 2 3 Mental 4 Human Behavior 5 Animal Behavior Psychology continues to influence and be influenced by the other sciences, especially in areas such as neuroscience and genetics. 6 In particular, the nature versus nurture argument that dates back to Francis Galton’s ideas of the 1920s continues to this day; recently, evolutionary psychology has contributed to the debate by exploring psychological traits as innate and biological phenomena, which are subject to the laws of genetics and natural selection. 7 Psychology is a huge subject, and its findings concern every one of us. In one form or another it informs many decisions made in government, business and industry, advertising, and the mass media. It affects us as groups and as individuals, contributing as much to public debate about the ways our societies are or might be structured as it does to diagnosing and treating mental disorders. 8 The ideas and theories of psychologists have become part of our everyday culture, to the extent that many of their findings about behavior and mental processes are now viewed simply as “common sense.” However, while some of the ideas explored in psychology confirm our instinctive feelings, just as many make us think again; psychologists have often shocked and outraged the public when their findings have shaken conventional, long-standing beliefs. 9 “The purpose of psychology is to give us a completely different idea of the things we know best.” Paul Valéry 10 In its short history, psychology has given us many ideas that have changed our ways of thinking, and that have also helped us to understand ourselves, other people, and the world we live in. It has questioned deeply held beliefs, unearthed unsettling truths, and provided startling insights and solutions to complex questions. 11 Its increasing popularity as a university course is a sign not only of psychology’s relevance in the modern world, but also of the enjoyment and stimulation that can be had from exploring the richness and diversity of a subject that continues to examine the mysterious world of the human mind. 12