Parental Alienation Syndrome (PAS) is one such theory. This unsophisticated, pseudoscientific theory explains a child’s estrangement from one parent or allegations of abuse at the hands of one parent by blaming the other

Parental Alienation Syndrome (PAS) is one such theory. This unsophisticated, pseudoscientific theory explains a child’s estrangement from one parent or allegations of abuse at the hands of one parent by blaming the other. The theory, developed by the late Richard A. Gardner, M.D., portrays the preferred parent (usually the mother under PAS) as an evil “alienator” who is virtually solely responsible for turning a vulnerable child against their estranged parent (usually the father under PAS)….there has been no consistent empirical or clinical evidence that PAS is a valid syndrome or that the so called “alienator’s” behavior is the actual cause of the alienated child’s behavior towards the target parent (Walker et al, 2005). In fact, the majority of mental health and legal experts who have studied the issue consider PAS theory to be both erroneous and dangerous to the children involved. http://www.leadershipcouncil.org/1/pas/faq.htm
http://ritualabuse.us/research/parental-alienation-syndrome/