By Professor of Psychology Adrian Furnham (University College London UK)
By Storr, Anthony
By Echo R Fling, Dr Anthony Attwood
By Lone Gammeltoft, Jannik Beyer
By Thomas Armstrong
By Robert D. Nye (State University of New York, New Paltz, USA)
By Isabel Briggs Myers, Peter B. Myers
By Kate Rankin
By Penny Kershaw
By Emily Ralls, Caroline Riggs
By Collins, Gary R.
By Paul J. Silvia
By Nick Lund
By Roger Tourangeau (The Gallup Organization), Lance J. Rips (Northwestern University, Illinois), Kenneth Rasinski (University of Chicago)
By Marilynn B. Brewer (Ohio State University), Miles Hewstone (Oxford University, UK)
By John Phillips, Lyndsey Stonebridge
By Yuko Yoshida
By DK
By Flanagan, Cara, Berry, Dave, Jones, Mark, Jones, Ruth, Liddle, Rob
By Debra Penman, Deborah Philips, Liz Linnington
By American Psychological Association
By Bo Hejlskov Elvén
By Helen Graham
By Scott D. Wright, Pamela A. Smith, Amy Maida Wadsworth, William McMahon, Kristina Cottle
By Nicky Hayes
By Cole
By Cara Flanagan
By Joseph H. Smith (Washington School of Psychiatry), William Kerrigan (University of Massachusetts)
By Peter Stratton, Nicky Hayes
By Gustave le Bon