In this book we have aimed to give you, the reader, an introduction to some of the basic theoretical concepts in psychology and to show how they have been applied in a range of professional areas. Psychology is a subject that most of us are interested in, and in this text we have tried to show what a versatile discipline psychology is and what an exciting subject it can be to study. The book is designed to show the connections between the various areas of applied psychology. For the most part, applied psychologists tend to produce specialist texts which are relevant to their own area of work. But much of the research in work psychology, for example, is rele­ vant to the applied areas of sport or health or education, and research into sport psychology has messages for health psychology too. What we is to draw out the relationships between the have tried to do in this text various areas and show how the same basic concepts may manifest themselves in different applied fields.