Fred N. Kerlinger
Maria Montessori
M. Scott Peck
K. D. Broota
Karen Pryor
Konstantin Stanislavsky
C. James Goodwin
Eric Berne
Jack Canfield
Sean Covey
Philip E. Tetlock
Frederick S. Perls
Graham Davey
Paula Polk Lillard
American Psychological Association.
Helen Gavin
Edward E. Jacobs
Joan Welkowitz
Brian Luke Seaward