This volume constitutes the proceedings of the third biennial conference of the International Society for Theoretical Psychology, held in Arnhem, the Netherlands, April 17-21, 1989. Fifty-six papers were presented during the four days of the conference, including an invited address by Professor A. D. de Groot, and seven papers composing two plenary sessions, four on the con tribution of history to theory, and three on theoretical alternatives for contem porary psychology. Of these, 46 papers are presented in the proceedings; all of which suffered editorial changes and, with the exception of the invited ad dress, were required to meet a 15 page restriction on length. The editors gratefully acknowledge John Mills, Leendert Mos, and Hank Starn for their invaluable editorial assistance. The papers included here are presented without discussants' commen taries. (Over 125 psychologists participated at the conference.) While the papers are representative of the scope of topics covered at the conference, the hours of formal and informal discussions must, unfortunately, be left to the reader's imagination. We encourage the reader to attend one of our next conferences, planned biennially, and alternately, in North America (1991) and Europe (1993)."

Some phenomena in medicine and psychology remain unexplained by current theory. Chronic fatigue syndrome, repetitive strain injury and irritable bowel syndrome, for example, are all diseases or syndromes that cannot be explained in terms of a physiological abnormality. In this intriguing book, Michael E. Hyland proposes that there is a currently unrecognised type of illness which he calls 'dysregulatory disease'. Hyland shows how such diseases develop and how the communication and art of medicine, good nursing care, complementary medicine and psychotherapy can all act to reduce the dysregulation that leads to dysregulatory disease. The Origins of Health and Disease is a fascinating book that develops a novel theory for understanding health and disease, and demonstrates how this theory is supported by existing data, and how it explains currently unexplained phenomena. Hyland also shows how his theory leads to new testable predictions that, in turn, will lead to further scientific advancement and development.

Some phenomena in medicine and psychology remain unexplained by current theory. Chronic fatigue syndrome, repetitive strain injury and irritable bowel syndrome, for example, are all diseases or syndromes that cannot be explained in terms of a physiological abnormality. In this intriguing book, Michael E. Hyland proposes that there is a currently unrecognised type of illness which he calls 'dysregulatory disease'. Hyland shows how such diseases develop and how the communication and art of medicine, good nursing care, complementary medicine and psychotherapy can all act to reduce the dysregulation that leads to dysregulatory disease. The Origins of Health and Disease is a fascinating book that develops a novel theory for understanding health and disease, and demonstrates how this theory is supported by existing data, and how it explains currently unexplained phenomena. Hyland also shows how his theory leads to new testable predictions that, in turn, will lead to further scientific advancement and development.