ISED 5 Tr~3 UNIVERSITY H ^n fFf^ti ^^M B ilsk If tffi THE INTELLIGENCE MEN: Makers of the IQ Controversy ^ ALSO BY RAYMOND FANCHER E. Psychoanalytic Psychology: The Development of Freud's Thought Pioneers of Psychology THE INTELLIGENCE MEN: Makers of the IQ Controversy Raymond Fancher E. W W ® • • NORTON COMPANY • New York • London Copyright © 1985 by Raymond E. Faneher All rights reserved. Published simultaneously in Canada by Penguin Books Canada Ltd., 2801 John Street, Markham, Ontario L3R 1B4. Printed in the United States of America. The text of this book is composed in 10/12 Baskerville, with display type set in Windsor Light Condensed. Composition and manufacturing by The Maple-Vail Book Manufacturing Croup. Book design by Nancy Dale Muldoon. First published as a Norton paperback 1987. Library ofCongress Cataloging in Publication Data Fancher, Raymond E. The intelligence men: Makers ofthe IQ controversy. Bibliography: p. Includes index. — 1. Intellect. 2. Intelligence tests History. I. Title. BF431.F27 1985 153.9 84-27381 ISBN D-B^G-TSSES-V W. W. Norton & Company, Inc., 500 Fifth Avenue, New York, N.Y. 101 10 W. W. Norton & Company Ltd., 37 Great Russell Street, London WC1B 3NU 4567890 2 3 In memoriam Bernard Norton Digitized by the Internet Archive 2012 in http://archive.org/details/intelligencemenOOraym Contents List of Portraits ix Preface xi The Nature-Nurture Controversy 1 i 2 The Invention of Intelligence Tests 41 3 Intelligence Redefined 84 4 The Rise of Intelligence Testing 117 5 Twins and the Genetics of IQ 162 6 Conclusion 226 Notes 242 Index 257