This is the original work on which Hans Eysenck's fifty years of research have been built. It introduced many new ideas about the nature and measurement of personality into the field, related personality to abnormal psychology, and demonstrated the possibility of testing personality theory experimentally. The book is the result of a concentrated and cooperative effort to discover the main dimensions of personality, and to define them operationally, that is, by means of strictly experimental, quantitative procedures. More than three dozen separate researches were carried out on some 10,000 normal and neurotic subjects by a research team of psychologists and psychiatrists. A special feature of this work is the close collaboration between psychologists and psychiatrists. Eysenck believes that the exploration of personality would have reached an advanced state much earlier had such a collaboration been the rule rather than the exception in studies of this kind. Both disciplines benefit by working together on the many problems they have in common. In his new introduction, Eysenck discusses the difficulty he had in conveying this belief to scientists from opposite ends of the psychology spectrum when he first began work on this book. He goes on to explain the basis from which Dimensions of Personality developed. Central to any concept of personality, he states, must be hierarchies of traits organized into a dimensional system. The two major dimensions he posited, neuroticism and extraversion, were in disfavor with most scientists of personality at the time. Now they form part of practically all descriptions of personality. Dimensions of Personality is a landmark study and should be read by both students and professionals in the fields of psychiatry, psychology, and sociology.

with contributions by numerous experts

Almost everyone has been touched by at least a mild form of depression, and thus has some sense of what severe depressive illness must be like. In addition to the most serious clinical cases which can lead to institutionalization or even suicide, this book explores the "normal" depression we all experience--the inevitable blues that accompany troubled personal relationships, career setbacks, or the death of a loved one. It provides a compelling treatment of questions about the nature of depression, where it comes from, who's at risk, and what it indicates about human experience. Depression is a highly prevalent health problem, affecting about 11 million Americans every year. Its costs are staggering - $43.7 billion annually in lost productivity, lost income, and increased health care costs. These numbers put depression on a par with heart disease as one of the most expensive diseases in the United States today. But, unlike heart disease, depression is widely misunderstood. About two-thirds of the cases of depression go undiagnosed and untreated. With a compelling mix of information, illustration, and interpretation, David B. Cohen explores the current state of knowledge about depression, including the powerful influence of genetics. In addition to depressive illness, the book deals with related ideas and topics such as mourning, mania, the rhythms of sleep, self concepts, and suicide. Insights from psychology and psychiatry are blended with history, literature, current events, and personal observation, and topped off with a dose of common sense.