What is happiness? Why are some people happier than others? This new edition of "The Psychology of Happiness" provides a comprehensive and up-to-date account of research into the nature of happiness. Major research developments have occurred since publication of the first edition in 1987 - here they are brought together, often with surprising conclusions. Drawing on research from the disciplines of sociology, physiology and economics as well as psychology, Michael Argyle explores the nature of positive and negative emotions, and the psychological and cognitive processes involved in their generation. Accessible and wide-ranging coverage is provided on key issues such as: the measurement and study of happiness; the effect of friendship, marriage and other relationships on positive moods, happiness, mental and physical health; the effects of work, employment and leisure; and the effects of money, class and education. The importance of individual personality traits such as optimism, purpose in life, internal control and having the right kind of goals is also analyzed. New to this edition is additional material on national differences, the role of humour, and the effect of religion. Does money make people happy? Are some countries happier than others? These are just some of the controversial questions addressed by the author along the way. Finally the book discusses the practical application of research in this area, such as how happiness can be enhanced, and the effects of happiness on health, altruism and sociability.