By Britt Wray
By Daniel Goleman
By Jeffrey A. Gray
By Jason Fox
By Kathlyn Hendricks, Gay Hendricks, PhD
By Brian Moses, Mike Gordon
By Donald Sturrock
By Capacchione, Lucia
By Paul Gilbert
By Daniel Nettle (Lecturer in Biological Psychology at the Open University)
By Peter Hollins
By Sigmund Freud
By Stott, Rebecca
By Kate Silverton
By Mel Collins, Jeremy Vine
By Jennifer Aaker, Naomi Bagdonas
By Max Lucado
By Andy McNab, Professor Kevin Dutton
By Gary Chapman, Ph.D.
By Glenda Fredman
By Ansembourg, Thomas d'
By Jill Dann
By R.L. Payne, Cary L. Cooper
By Prof Paul Ekman (Professor of Psychology)
By Sally Planalp (University of Montana)
By Brian Parkinson, Agneta H. Fischer, Antony S.R. Manstead
By Joseph Ledoux
By Sara Wengerd
By Carl Plantinga (Associate Professor of Theater Arts, Calvin College), Greg M. Smith (Instructor, Georgia State University)
By Christiane Sanderson