In Decembe, r, 1984 a NATO-sponsored Advanced Study Institute entitled "Human Asessment:Cognition and Motivation" took place in Athens. It succeeded in attracting a great many of the most eminent scholars and researchers in this area, both as lecturers and participants. The contributors to this book are mostly members of staff who taught at the Institute. The chapters they have written are designed to provide an introduction to the principal issues that arise in the study of the assessment of intelligence and cognition. Since most of the protagonists are represented in this book the student is provided with an excellent overview. Many different people are responsible for preparation of a book such as this. We would like to express particular thanks to Siobhan Breslin and Julie Coleman, who typed the text despite an unfriendly and unreliable word-processing system. Thanks are also due to Steve Gill who helped with the preparation of the figures. Finally, as a mark of respect for his achievements and leadership in the field of mental measurement, we dedicate this volume to Norman Frederiksen. Sidney H. Irvine Stephen E. Newstead Plymouth, September 1985. -VII- CONTENTS Preface VII Contributors to this volume XI Functions and constants in mental measurement: Chapter 1 A taxonomic approach. 1 Sidney H. Irvine Human cognition and intelligence: Towards an Chapter 2 integrated theoretical perspective. 27 John M. Verster Chapter 3 Synopsis of a triarchic theory of human intelligence.