Invitation To Rational Emotive Behavioural Psychology - Rational Emotive Behaviour Therapy Author:Windy Dryden Rational-Emotive Psychology (REP) is an approach to psychology which considers the influence that a person's beliefs (both rational and irrational), emotions and behaviours have on his or her psychological well-being. This second edition of the text provides an introduction to REP suitable for those encountering the field for the first time.