Parental alienation (or Hostile Aggressive Parenting) is a theory first popularized by Dr. Richard A. Gardner as Parental Alienation Syndrome (PAS). It has been controversial, and allegations of PAS were not admissible in most courts as of 2006. But under this theory, parental alienation occurs when a group of parental behaviors are damaging to children's mental and emotional well-being, and can interfere with a relationship of a child and either parent. These behaviors most often accompany high conflict marriages, separation or divorce. These behaviors whether verbal or non-verbal, cause a child to be mentally manipulated or bullied into believing a loving parent is the cause of all their problems, and/or the enemy, to be feared, hated, disrespected and/or avoided. Characteristics, such as lack of empathy and warmth, between the rejected parent and child are some indicators. The term does not apply in cases of actual child abuse, when the child rejects the abusing parent to protect themselves. Parental alienation is controversial in legal and mental health professions, both generally and in specific situations. Terms related to parental alienation include child alienation, pathological alignments, visitation refusal, brainwashing, pathological alienation, the toxic parent and parental alienation syndrome,
First described in 1976 as "pathological alignment", the dynamic refers to a situation in which a child unreasonably rejects a non-custodial parent. Richard A. Gardner proposed parental alienation syndrome in the 1980s based on his clinical experience with the children of divorcing parents. Since that time, other researchers have suggested focusing less on diagnosing a syndrome and more on what has been described as the "alienated child", and the dynamics of the situation that have contributed to the alienation. In this view, alienation is seen as a breakdown of attachment between parent and child and may be caused by multiple factors. The behaviors of all family members, including those of the alienated parent, may lead to family dysfunction and the rejection of a parent. The evaluation of all contributing factors and all possible remedies are recommended in evaluating cases where children have become estranged from a parent.
Parental alienation lacks a single definition and its existence, etiology, characteristics, and in particular the concept of parental alienation syndrome have been the subject of debate. Some formulations of the concept have emphasized the role of an alienating parent, termed variously the "programming" parent or "embittered-chaotic parent". More recent descriptions, influenced by the research of Kelly and Johnston, have proposed a more complex analysis, in which all family members may play a role. This "systems-based" view acknowledges that a child may be alienated from one parent without "alienating" behaviour by the other parent. The results of an empirical study also suggest that alienating behaviors by both parents are the norm in high-conflict divorces. Rejected parents, generally fathers, tend to lack warmth and empathy with the child; instead, they engage in rigid parenting and critical attitudes. The rejected parent is often passive, depressed, anxious, and withdrawn - characteristics which may encourage further rejection. The parent that the child aligns with (the aligned parent) may engage in alienating behaviors, including undermining the other parent. These behaviors may be conscious and deliberate or, alternatively, may reflect a lack of awareness on the effect of the actions on the children. Direct alienating behaviors occur when one parent actively undermines the other parent, such as making derogatory remarks about the other parent, telling the child that the other parent is responsible for the separation, or telling the child that the other parent is the cause of financial difficulties. Indirect alienation behaviors occur when one parent fails to support access or contact with the other parent or tacitly accepts the child's negative behaviour and comments towards the other parent.
Most of the peer-reviewed publications on the subject have been in the form of descriptions and definitions. Some empirical research has been done, though the quality of the studies vary widely and research in the area is still underdeveloped. One significant longitudinal study of 1000 cases has been completed by Dr. Clawar and Ms. Rivkin. Sample selection bias is an obvious problem in many of the studies. For example, when alienated children have been interviewed, it is likely that the children selected for study have been among the most severely alienated and suffering children. The beliefs of judges, lawyers, and mental health professionals have been cited extensively in peer reviewed literature.Nonsensical
A survey of mental health and legal professionals indicated that there is moderate support for the existence of parental alienation. However, there remains general reluctance to accept the concept of parental alienation syndrome (PAS). William Bernet argued for the inclusion of parental alienation disorder, a diagnosis related to parental alienation, in the fifth version of the Diagnostic and Statistical Manual of Mental Disorders, which was released in 2013. His conception makes reference to PAS and a variety of other descriptions of behaviors he believes represent the underlying concept of parental alienation disorder. Despite lobbying by proponents, in December 2012, the proposal was rejected. Similarly, the American Psychological Association has rejected Parental Alienation Syndrome as unscientific and sexist. The APA whitepaper notes: "Although there are no data to support the phenomenon called parental alienation syndrome, in which mothers are blamed for interfering with their children’s attachment to their fathers, the term is still used by some evaluators and courts to discount children’s fears in hostile and psychologically abusive situations." [ American Psychological Association, Violence and the Family, American Psychological Association, Washington, D.C., 1996, p. 40] Some have suggested that the general idea of PAS is covered in the DSM-5 under a closely related diagnosis: "Parent-Child Relational Problem." For example, the child’s perception of an alienated parent "may include negative attributions of the other’s intentions, hostility toward or scapegoating of the other (parent), and unwarranted feelings of estrangement." 
In a survey at the Association of Family and Conciliation Courts in 2010, 98% of the 300 respondents agreed with the question, "Do you think that some children are manipulated by one parent to irrationally and unjustifiably reject the other parent?". However, Parental Alienation Syndrome refers not to this manipulation, but to a serious illness in the child in which he or she despises and rejects one of the parents. Since both the American Psychiatric Association and American Psychological Association have explicitly rejected Parental Alienation Syndrome, it does not meet the Frye test for admissibility in court in most states. Attorneys and expert witnesses may still argue that a parent undermines the child's relationship with the other parent through inappropriate actions or statements.
Realistic estrangement is a different phenomenon from "pathological alienation". The former is an understandable refusal by a child to see an abusive parent, while the latter is emotionally harmful and unjustified.
Developments since 2010
Superior courts worldwide are now recognising parental alienation as serious child abuse with long-term effects and serious outcomes for the “PAS Child”. Some jurisdictions have enacted parental alienation as a criminal offence, the latest being Brazil and Mexico.
As a result of mistrust of psychological expert witnesses, many courts now require professional accreditation and registration of any person invoking the term parental alienation.
- Parental Alienation Study Group
- Parental alienation at DMOZ
- National Coalition Against Parental Alienation
- Parental Alienation Awareness Association
- Divorce and Parental Alienation – Hurting The Kids Caught In The Middle
- A veteran family-systems therapist comments on PAS.
- Co-parenting with a Toxic Ex: What to Do When Your Ex-Spouse Tries to Turn the Kids Against You (2014) by Amy J. L. Baker and Paul R Fine
- Divorce Poison: How to Protect Your Family from Bad-mouthing and Brainwashing, by Richard Warshak (2010, updated edition)
- Parental Alienation, DSM-5, and ICD-11, by William Bernet (Author, Editor) (2010)
- Adult Children of Parental Alienation Syndrome: Breaking the Ties That Bind by Amy J. L. Baker
- Brainwashing Children by John Thomas Steinbeck (2011)
- Bessette, Francoise T. (2008). Disciplining Divorcing Parents: The Social Construction of Parental Alienation Syndrome (PDF) (Masters Thesis ed.). Kingston , Ontario, Canada: Queen’s University. p. 115. Retrieved 2015-08-20.
- Hoult, J.D., Jennifer (2006). "The Evidentiary Admissibility of Parental Alienation Syndrome: Science, Law, and Policy" (PDF). Children’s Legal Rights Journal 20 (1): 1–61. Retrieved 2015-08-20.
- "PAAO - Raising Awareness of Parental Alienation and Hostile Aggressive Parenting". Parental Alienation Awareness Organization. Retrieved 25 April 2015.
- Warshak, R. A. (2010). Divorce Poison: How to Protect Your Family from Bad-mouthing and Brainwashing. New York: Harper Collins.
- Warshak, R. A. (2002). Misdiagnosis of Parental Alienation Syndrome. American Journal of Forensic Psychology, 20, 31-52.
- Warshak, R. A. (2001). Current Controversies Regarding Parental Alienation Syndrome. American Journal of Forensic Psychology, 19, 29-59.
- Bala, N; Fidler B; Goldberg D; Houston C (2007). "Alienated Children and Parental Separation: Legal Responses from Canada's Family Courts". Queens Law Journal 33: 79–138.
- Warshak, R. A. (2003). Bringing Sense to Parental Alienation: A Look at the Disputes and the Evidence. Family Law Quarterly, 37, 273-301.
- Bernet, W (2008). "Parental Alienation Disorder and DSM-V". The American Journal of Family Therapy 36 (5): 349–366. doi:10.1080/01926180802405513.
- Bow, JN; Gould JW; Flens JR (2009). "Examining Parental Alienation in Child Custody Cases: A Survey of Mental Health and Legal Professionals". The American Journal of Family Therapy 37 (2): 127–145. doi:10.1080/01926180801960658.
- Jaffe, PG; Lemon NKD; Poisson SE (2002). Child Custody & Domestic Violence. SAGE Publications. pp. 52–54. ISBN 978-0-7619-1826-4.
- Ackerman MJ (2001). Clinician's guide to child custody evaluations. New York: John Wiley & Sons. pp. 73–82. ISBN 0-471-39260-X.
- Waldron, KH; Joanis DE (1996). "Understanding and Collaboratively Treating Parental Alienation Syndrome". American Journal of Family Law 10: 121–133.
- Sparta, SN; Koocher GP (2006). Forensic Mental Health Assessment of Children and Adolescents. Oxford University Press. pp. 83, 219–221. ISBN 978-0-19-514584-7.
- Hands, A. J. & Warshak, R. A. (2011). Parental Alienation Among College Students. The American Journal of Family Therapy, 39, 431-443.
- Clawar, SS; Rivkin BV (2013). Children Held Hostage: Identifying Brainwashed Children, Presenting a Case, and Crafting Solutions. Amrican Bar Association. pp. 560 , 219–221. ISBN 978-1-62722-155-9.
- Rotstein, Gary (February 15, 2010). "Mental health professionals getting update on definitions". Pittsburgh Post-Gazette. Retrieved 2010-03-02.
- "American Psychiatric Association Board of Trustees Approves DSM-5-Diagnostic manual passes major milestone before May 2013 publication". American Psychiatric Association. 1 December 2012.
- Kay, B. (2013). Barbara Kay: Teaching children to hate the ex. National Post, May 23, 2013.
- Franklin, R. (2013). Limited Definition of parental alientation syndrome included in the DSM-V. National Parent's Organization, May 26, 2013.
- Lorandos, D., W. Bernet and S.R. Sauber (2013). Overview of Parental Alienation. In Lorandos, D., W. Bernet and S.R. Sauber (2013) Parental alienation. The Handbook for Mental Health and Legal Professionals. Charles C Thomas, Springfield.
- Pagers, Parental Alienation Awareness Association.
- See Margaret A. Hagen, Whores of the Court.