Quantitative Methods in Personality Research R. CHRIS FRALEY AND MICHAEL J. MARKS Volume 3, pp. 1637–1641 in Encyclopedia of Statistics in Behavioral Science ISBN-13: 978-0-470-86080-9 ISBN-10: 0-470-86080-4 Editors Brian S. Everitt & David C. Howell  John Wiley & Sons, Ltd, Chichester, 2005