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Parental Alienation Prevalence Claims Under Scrutiny: A Primary-Source Evidence Base

Purpose. A balanced, citation-led evidence base examining what prevalence figures are actually defensible in the parental alienation (PA) literature, where the numbers come from, and how they hold up to methodological scrutiny. Prepared for the AntiAlienate knowledge repository (CC BY 4.0). Foregrounds primary sources and verbatim quotation. Includes the strongest peer-reviewed critiques so advocates can frame numbers honestly rather than over-claim.

Compilation date. 2026-05-25. URLs verified at compilation. Where a primary text was not directly accessible, the citation is marked [secondary verification only] and should be re-checked against the original. "Not publicly confirmed" is used wherever a specific empirical claim could not be tied to a primary source.

Why this page exists

The PA discourse runs on a small number of headline numbers — 740,000 US children (Bernet 2010), 1% of US children (Bernet's derived rate), 13.4% / 22 million US parents (Harman et al. 2016), 35.5% / 39.1% / 22 million (Harman et al. 2019), 75% of Italian adults (Bernet, Baker & Verrocchio 2015), 98.3% of UK 18–25-year-olds (Hine et al. 2026). These end up in court testimony, legislative testimony, press releases, and advocacy material, often un-attributed or with methodology scrubbed.

The honest position — supported by the pro-recognition camp's own caveats and by the most methodologically rigorous middle-ground review (Saini, Johnston, Fidler & Bala, 2016) — is that the field has no defensible population-prevalence estimate, while PA-pattern behaviour and its sequelae in those affected are empirically robust at the qualitative and within-sample-correlational level. This page lays out the actual source material so the repository can cite these numbers truthfully.

Table of contents

  1. Bernet's "740,000 children" calculation chain
  2. Harman et al. 2016 — the first representative-poll prevalence (NC, n = 610)
  3. Harman, Leder-Elder & Biringen 2019 — three national polls (US + Canada)
  4. Hine, Harman et al. 2025 / 2026 — UK separated-parents and 18–25 prevalence
  5. Verrocchio / Bernet / Baker Italian work
  6. The Saini, Johnston, Fidler & Bala 2016 prevalence critique
  7. Templer, Matthewson, Haines & Cox 2017 systematic review
  8. Cross-national / non-English prevalence work
  9. Bentley & Matthewson 2020 — qualitative, not prevalence
  10. The Harman & Lorandos vs. Meier exchange
  11. UN OHCHR / Alsalem A/HRC/53/36 on the empirical basis of PA claims
  12. Forensic implications — does "1% / 740,000" survive Daubert/Frye scrutiny?
  13. What WOULD a defensible prevalence study look like? (contributor invitation)
  14. Synthesis — confidence levels by claim category
  15. Honest framing for advocates

1. Bernet's "740,000 children" calculation chain

1.1 The primary source

Citation. Bernet, W., von Boch-Galhau, W., Baker, A. J. L., & Morrison, S. L. (2010). Parental Alienation, DSM-V, and ICD-11. The American Journal of Family Therapy, 38(2), 76–187. https://doi.org/10.1080/01926180903586583 — companion volume: Bernet, W. (Ed.) (2010). Parental Alienation, DSM-5, and ICD-11. Charles C. Thomas Publisher. [secondary verification only] for the exact verbatim wording of the 740,000 derivation — the full Bernet et al. (2010) AJFT 38(2) issue is paywalled and ResearchGate access returned HTTP 403 at compilation. The calculation as widely reported by both Bernet's collaborators and his critics is identical.

1.2 The calculation chain

As reproduced in Harman, Leder-Elder & Biringen (2019, §1, abstract and introduction): "researchers have had to rely on probability estimates based on factors such as the number of divorced families there are in a given population and the number of these families that are considered 'high conflict.' Using such estimation procedures, an estimated 1% of all children are alienated from a parental figure to some degree (see Bernet, 2010; Warshak, 2015)."

The chain Bernet presents:

Step Multiplier Source / status
US children & adolescents (base population) US Census
× children in separated / divorced households ≈ 20–25% Demographic point-in-time estimate
× of those, in "high-conflict" disputes ≈ 25% Johnston (1993, 2003) custody-research estimate
× of those, who become alienated ≈ 25% Johnston-type custody-research estimate
= aggregate rate ≈ 1–1.25% Bernet's derivation
= absolute count ≈ 740,000 US children Applied to ~74M US children base

1.3 What the figure is

A point estimate produced by multiplying three uncertain proportions. It is a back-of-envelope reasoning step, not a measurement. The 2019 Harman team itself describes the approach as "probability estimates" rather than direct measurement.

1.4 Why the figure is fragile

  • Each multiplier is itself an estimate with substantial uncertainty. If each input has ±25% relative error, compounded uncertainty in the product is roughly ±50% — 740,000 could be 370,000 or 1.1 million while still being "consistent with the inputs."
  • "High-conflict" lacks a population-level operational definition. Johnston's 25% high-conflict figure is from clinic / court samples, not general population. Generalising to the entire divorced population overstates.
  • "Become alienated" depends entirely on threshold. Saini et al. 2016 (§6 below) documents that there are no validated psychometric instruments to operationally classify a child as "alienated" in a population study.
  • Bernet has not, to public knowledge, updated the 740,000 figure with post-2010 US Census data. The 2020 US child population (under 18) is ~73.1 million; recalculating with the same 1% rule yields ~731,000 — essentially unchanged, but this is not a recalculation that improves reliability, just a demonstration that the underlying inputs have not been re-derived.

1.5 The honest framing

"Bernet (2010) estimated approximately 740,000 US children are affected by parental alienation, derived by multiplying ~20% of children in separated households × ~25% in high-conflict disputes × ~25% who become alienated. This is a back-of-envelope deduction from three uncertain inputs, not an empirical measurement."

2. Harman, Leder-Elder & Biringen (2016) — the first representative-poll prevalence

2.1 Citation and primary access

Citation. Harman, J. J., Leder-Elder, S., & Biringen, Z. (2016). Prevalence of parental alienation drawn from a representative poll. Children and Youth Services Review, 66, 62–66. https://doi.org/10.1016/j.childyouth.2016.04.021 — landing URL: https://www.sciencedirect.com/science/article/abs/pii/S0190740916301335

2.2 Sample and method

  • N = 610 adults ≥ 18 yrs in North Carolina, US
  • Recruitment: random-digit dialling of home and cell-phone numbers
  • Brief telephone poll — at most five questions (only three asked of non-parents)

2.3 Headline figures (as reported by the authors and re-stated in Harman et al. 2019)

From Harman et al. (2019) §1 (verbatim of their own 2016 summary): "Results indicated that 13.4% of parents reported being the targets of PABs which, based on the U.S. population at the time of the survey, generalizes to an estimated 22,141,650 adults in the U.S. Notably, about half of the sample rated their experience as 'severe' (Harman, Leder-Elder, & Biringen, 2016)." Also reported in the 2019 paper §4: "13.4% of parents (or 9.03% of the entire sample) had been alienated from one or more of their children (Harman et al., 2016)."

2.4 The authors' own caveats (verbatim, Harman et al. 2019 §1)

"Whether a parent feels they are being alienated from a child can be very different than if they actually are. Parents who engage in PABs sometimes believe they are the targets of PA themselves, and some parents who are the targets of PABs do not label their experience as such. ... Second, the poll was limited to North Carolina residents."

A single-item self-report of feeling alienated, one US state, telephone poll, no validating instrument, no comparison group. The headline "22 million" is the 13.4% multiplied up to US census-population scale.

3. Harman, Leder-Elder & Biringen (2019) — three national polls

3.1 Citation and access

Citation. Harman, J. J., Leder-Elder, S., & Biringen, Z. (2019). Prevalence of adults who are the targets of parental alienating behaviors and their impact: Results from three national polls. Children and Youth Services Review, 106, 104471. https://doi.org/10.1016/j.childyouth.2019.104471 — open-version: https://childrightsngo.com/newdownload/downloadsection7/Research%20PA%20effects%20adulthood%20of%20children%20Harman%20Leder%20Elder%20&%20Biringen%202019%20IMP.pdf

3.2 Verbatim abstract (in full)

"Estimating the prevalence of parental alienation is challenging because not all children who are exposed to parental alienating behaviors become alienated (Harman, Bernet, & Harman, 2019). The purpose of the current study was to determine whether the proportion of adults who indicate being alienated from a child will be similar to results from a previous poll of North Carolina adults (Harman, Leder-Elder, & Biringen, 2016) using three nationally representative on-line survey panels from United States and Canada, and to determine the mental health impact of parental alienating behaviors. Results from the first two polls indicate that the prevalence of parents who feel they are being alienated from their children is higher than originally estimated: 35.5% (of 273) in the U.S. and 32% (of 397) in Canada. Using another means of assessment for the third poll, 39.1% (of 594) of parents in the US are the non-reciprocating targets of parental alienating behaviors, which is over 22 million parents and confirms previous estimates that did not differentiate between reciprocating and non-reciprocating parents (Harman et al., 2016). Of these, 6.7% of the parents had children who were moderately to severely alienated, which is at least 1.3% of the US population. Alienated parents also had high levels of depression, trauma symptoms, and risk for suicide. Ramifications of these findings for researchers and practitioners are discussed."

3.3 Sample architecture

Poll Country Total N Parents/guardians n Recruitment Mode
1 US 600 284 (48.5%) Qualtrics panel, proportioned to US demographics Online
2 Canada 600 (588 in some tables) 209 (35.2%) Qualtrics panel, proportioned to Canadian demographics Online
3 US 594 (parents) 594 Qualtrics panel Online with expanded instrument

Mean US age 43.49 (SD 16.88); 50.1% female. Mean Canadian age 40.81 (SD 19.10); 50.8% female.

3.4 Verbatim question wording (the load-bearing item)

The single-item subjective measure asked of parents (US Poll 1 / Canada Poll 2):

"Do you feel that the other parent has engaged in parental alienating behaviors towards you to harm or damage your relationship with your child(ren)?"

The PA-outcome item:

"Do you feel that you have been alienated from one or more of your children by the other parent? In other words, have the alienating behaviors of the other parent been successful in harming your relationship with your child(ren)? (Yes or No as response options)."

A preceding definitional prompt is provided to respondents framing PABs as "strategies used to harm or destroy the relationship between a child and a parental figure." The 35.5% / 32% / 39.1% figures are all responses to feelings-of-experience items, not measurements of children's actual rejection or relationship status.

3.5 The 22 million parent extrapolation

From Harman et al. (2019) §4: applying the percentages to 2018 US Census, "there are approximately 40,206,260 American parents who feel as if they are the targets of PABs (16.17% of total sample), and 29,414,970 parents who feel that the alienating behaviors of the other parent have damaged their relationship with their child and has resulted in PA (11.83% of the total sample)." The "22 million" figure from 2016 has been upgraded by the authors' own 2019 calculation to 29–40 million. Advocacy literature typically cites the conservative 22 million; the authors' more recent work claims considerably more.

3.6 The authors' own caveats (verbatim, §4)

"Many parents believe they are targets of parental alienation but may not fully understand what the term means. For example, if a parent is unable to communicate with their child for a few days while in the care of the other parent, they may believe they are being alienated. In order to be considered a parental alienating behavior, the behavior needs to be enacted as part of a larger cluster of behaviors over time, with the intent to harm the relationship between the parent and the child (Harman et al., 2018). Therefore, it is possible that the respondents in the first two polls perceived PABs were occurring when in fact they were not."

This is from the pro-recognition authors themselves and is the honest reading of their own numbers.

3.7 The internal "1.3% of US population" figure

From the abstract: "6.7% of the parents had children who were moderately to severely alienated, which is at least 1.3% of the US population." This is the new equivalent of Bernet's 1%, derived from Poll 3's expanded instrument. The order-of-magnitude convergence with Bernet's back-of-envelope 1% is interesting but not vindication of the original calculation — both depend on threshold ("moderately to severely" by what cutoff?) and the upstream filter (must be a parent who already feels alienated).

4. Hine, Harman et al. — UK separated parents (2025) and UK 18–25 (2026)

4.1 UK separated parents

Citation. Hine, B., Harman, J. J., Leder-Elder, S., & Bates, E. A. (2025). Examining the Prevalence and Impact of Parental Alienating Behaviors (PABs) in Separated Parents in the United Kingdom. Journal of Family Violence. https://doi.org/10.1007/s10896-025-00910-4 — URL: https://link.springer.com/article/10.1007/s10896-025-00910-4 — [secondary verification only] for the verbatim abstract; the article landing page returned HTTP 303 redirect at compilation.

Sample. N = 1,005 separated or divorced parents in the UK.

Headline figures (from publisher abstract). "Results showed that, depending on how they were asked, between 39 and 59% of the sample had experienced PABs, with 36.5% identified as non-reciprocal targeted parents."

Why load-bearing. First UK separated-parent national PA-prevalence study; replicates the US/Canada Harman pattern with similar magnitudes. The 39%–59% range across question-wording variants is itself the most important finding: it documents that "PAB prevalence" is highly sensitive to how the question is asked.

4.2 UK 18–25 young adults

Citation. Hine, B. A., Harman, J. J., Leder-Elder, S., & Bates, E. A. (2026). Prevalence and impact of parental alienating behaviors (PABs) in adults aged 18–25 in the United Kingdom. Frontiers in Public Health, 14, 1803173. https://doi.org/10.3389/fpubh.2026.1803173 — URL: https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2026.1803173/full

Verbatim abstract excerpt. "A sample of 1,004 participants aged 18–25 completed an online survey assessing exposure to 30 established PABs, parental acceptance and rejection, and mental health outcomes, including post-traumatic stress, depression, and suicidality. Results revealed that 98.3% of participants reported experiencing at least one PAB from a parent during childhood, with over half reporting exposure to ten or more behaviors. Approximately one-quarter experienced twenty or more behaviors. Males reported significantly higher exposure to PABs than females, though no other demographic differences were found. Exposure to PABs was significantly correlated with increased parental rejection and decreased parental acceptance, as well as elevated symptoms of PTSD, depression, and suicidal ideation."

Sample. N = 1,004 UK residents aged 18–25 (mean 21.24, SD 2.04); 24.3% male, 75.7% female. Online panel via Atomik Research, Feb 21–Mar 3 2024.

Headline figures: 98.3% endorsed at least one PAB; 58.5% endorsed ≥10; 25.9% endorsed ≥20.

Why this is the cleanest illustration of the question-wording problem. When PA is operationalised as "exposure to at least one of 30 behaviours during childhood from a parent," the prevalence reaches ~98%. This essentially means "nearly all parenting includes at least one PAB-listed behaviour at some point." The clinically and forensically meaningful construct is the cluster, intent, sustained pattern over time (as the Harman team itself emphasises in their own caveats). A 98% figure is therefore not a claim that 98% of UK young adults experienced parental alienation — it is a measurement of how broadly the operational definition is drawn.

5. Verrocchio / Bernet / Baker Italian work

5.1 Bernet, Baker & Verrocchio (2015) — SCL-90-R study

Citation. Bernet, W., Baker, A. J. L., & Verrocchio, M. C. (2015). Symptom Checklist-90-Revised scores in adult children exposed to alienating behaviors: An Italian sample. Journal of Forensic Sciences, 60(2), 357–362. https://doi.org/10.1111/1556-4029.12681 — PubMed 25613416 — https://pubmed.ncbi.nlm.nih.gov/25613416/

Sample. N = 739 adults in Chieti, Italy. Retrospective survey: Baker Strategy Questionnaire (childhood PA exposure) + SCL-90-R (current symptomatology).

Headline figures. - ≈ 75% of participants reported some exposure to parental alienating behaviours during childhood - 15% endorsed the specific item "tried to turn me against the other parent" - Strong, statistically significant associations between reported PA exposure and SCL-90-R indices

Population-prevalence interpretability. Limited. This is a community sample but not a probability sample of the Italian population; "some exposure" is a threshold-dependent figure (any-vs-none endorsement of a broad strategy menu) and should not be read as "75% of Italians experienced PA." The 15% endorsing the explicit "turn me against the other parent" item is the more clinically meaningful figure but is still self-report, retrospective, single item.

5.2 Verrocchio, Marchetti & Fulcheri (2015)

Citation. Verrocchio, M. C., Marchetti, D., & Fulcheri, M. (2015). Perceived parental functioning, self-esteem, and psychological distress in adults whose parents are separated/divorced. Frontiers in Psychology, 6, 1760. https://doi.org/10.3389/fpsyg.2015.01760 — URL: https://www.frontiersin.org/articles/10.3389/fpsyg.2015.01760/full

Sample. 470 Italian adults from separated/divorced families. Not a general-population sample. Establishes correlation between PA exposure and adult distress (r = 0.239, p < 0.01); not a prevalence figure.

5.3 Verrocchio, Baker & Bernet (2016)

Citation. Verrocchio, M. C., Baker, A. J. L., & Bernet, W. (2016). Associations between exposure to alienating behaviors, anxiety, and depression in an Italian sample of adults. Journal of Forensic Sciences, 61(3), 692–698. https://doi.org/10.1111/1556-4029.13046 — PubMed 27122408.

Sample. N = 509 Italian community adults. Pathway model (AB exposure → psychological maltreatment → impaired bonding → depression/anxiety). Not a population-prevalence study.

Bottom line for the Italian work. The Italian quantitative programme is the strongest outcomes / sequelae literature in the field. It is not a prevalence programme and should not be cited as such.

6. The Saini, Johnston, Fidler & Bala (2016) prevalence critique

6.1 Citation and access

Citation. Saini, M., Johnston, J. R., Fidler, B. J., & Bala, N. (2016). Empirical Studies of Alienation. Chapter 13 (pp. 374–430) in L. Drozd, M. Saini, & N. Olesen (Eds.), Parenting Plan Evaluations: Applied Research for the Family Court (2nd ed.). Oxford University Press. https://doi.org/10.1093/med:psych/9780199396580.003.0013 — open PDF (Nevada Supreme Court session materials): https://nvcourts.gov/__data/assets/pdf_file/0021/43941/Session_2-_Saini_Johnston_Fidler_Bala_Alienation_2016.pdf

6.2 Methodology

The authors built a GRADE-adapted (Grading of Recommendations Assessment, Development and Evaluation) rating instrument for the field and applied it to 58 empirical studies of alienation identified through systematic search (up from 39 in their 2013 first-edition chapter). Two co-authors independently rated each study on eight criteria. They report (p. 377): "The instrument developed for grading the studies for this review was adapted from others developed for the purpose of ensuring common standards for scientific reporting of research (GRADE)."

6.3 The verbatim prevalence verdict (load-bearing — p. 421)

"Prevalence: To date, there are no defensible estimates of the prevalence of parental alienation. The problem can occur regardless of age and gender of parent and child in all family structures. However, adolescents are likely to be more entrenched in their stance, and fathers are more likely than mothers for a variety of reasons to suffer the rejection of their children in custody-litigating families."

And from the chapter's "Summary of Composite Findings — Prevalence" section (p. 380):

"In the absence of randomly drawn samples, and lacking common definitions of alienation, to date there are no defensible estimates of the prevalence or incidence of the problem. Among the studies aimed at estimating the extent of alienation, widely varying rates among separated parents were reported (Baker & Chambers, 2011; Baker & Verrocchio, 2013; Bala, Hunt, & McCarney, 2010; Johnston, 1993, 2003; Lampel, 1996a; Moné & Biringen, 2006; Racusin, Copans, & Mills, 1994; Spruijt, Eikelenboom, Harmeling, Stokkers, & Kormos, 2005)."

6.4 The verbatim verdict on the empirical literature as a whole (p. 420)

"State of the evidence: The extant body of empirical research on parental alienation comprising 58 studies was reviewed and assessed by conventional standards of quality to draw empirically supported general conclusions. As a group, the empirical studies were found to be methodologically weak, with limited ability to generalize the results of any one study. The clinician should be wary of the numerous knowledge claims in this field and realize the strongly supported empirical findings are relatively few. However, these conclusions are likely to change as new and better-quality research becomes available."

6.5 The methodological diagnosis (p. 412)

"A major limitation of the empirically based studies of alienation is that many lack the critical design elements permitting generalizability of their findings. Rather, they are characterized by small, nonrandom samples, data analyzed retrospectively, the use of descriptive statistics rather than mathematically calculated comparisons, a lack of consensus on the definitions of alienation, and the use of varying nonstandardized measures and procedures. Although the number of empirical studies has grown since the last revision of this chapter (from 39 to 58), many of these same methodological limitations continue to plague the generalizability of the findings."

6.6 What the chapter does not say

The chapter does not say PA doesn't occur. It does not say the qualitative or correlational evidence is worthless. Its repeated finding (verbatim, p. 422): "professionals in the family justice field considered themselves moderately to extremely knowledgeable about alienation and endorsed the importance of assessing for it in custody and visitation cases ... respondents recognized the lack of sound research to support the concept, although they acknowledged the existence of alienation dynamics within the child custody field generally and in their caseloads specifically."

The chapter's position is middle: PA-pattern behaviour exists and is recognised; prevalence claims based on the existing literature are not defensible.

6.7 The often-quoted "82% low / very low quality" figure

A figure circulating in PA-critical secondary sources is "82% of 39 studies low or very low quality, zero high-quality." This number does not appear verbatim in the 2016 second-edition chapter at the locations checked. The 2016 chapter reports 58 studies and characterises them collectively as "methodologically weak" but does not, in the sections accessed, present a numerical breakdown by GRADE tier. The "82%" likely originates from the 2013 first-edition (39-study) chapter or from secondary characterisations. Mark as: not directly confirmed in the 2016 chapter at the locations accessed; specific percentage breakdown requires direct check of either the first-edition chapter or the appendix tables of the second edition. The qualitative verdict ("methodologically weak as a group") is uncontested.

7. Templer, Matthewson, Haines & Cox (2017) — systematic review on interventions

Citation. Templer, K., Matthewson, M., Haines, J., & Cox, G. (2017). Recommendations for best practice in response to parental alienation: Findings from a systematic review. Journal of Family Therapy, 39(1), 103–122. https://doi.org/10.1111/1467-6427.12137 — URL: https://onlinelibrary.wiley.com/doi/abs/10.1111/1467-6427.12137

Search. Medline, Embase, PsycINFO, Cochrane Central Register of Controlled Trials, conference abstracts.

Yield. Ten articles met inclusion (peer-reviewed journal articles or books in English on psychological or legal intervention for PA).

On prevalence specifically. The Templer et al. review is an intervention-effectiveness review, not a prevalence review. It does not produce a population-prevalence estimate. The fact that a systematic search yielded only ten qualifying intervention studies is itself relevant to the broader claim that the PA empirical base is thin.

What it concluded. "Parental alienation requires legal and therapeutic management to enhance family functioning ... awarding primary parental responsibility to the targeted parent and providing specialized family therapy is effective in ameliorating parental alienation." This conclusion has been actively contested (see §10 below); it is included here for completeness, not endorsement.

8. Cross-national / non-English prevalence work

  • Spanish. López, T. J., Iglesias, V. E. C., & García, M. F. R. (2014). AJFT 42(3), 217–231 — [secondary verification only]; cited by Saini et al. (2016) for gender-symmetry observation, not a prevalence study.
  • Greek. Specific Vasiliki Deliyanni-Kouimtzi PA prevalence work is not publicly confirmed at compilation. A Greek court-decisions study (Matsa et al. 2022, Healthcare 10(12), 2522, https://www.mdpi.com/2227-9032/10/12/2522) reviewed 50 parental-communication-prevention cases 1992–2019 — a judicial-decision review, not population prevalence.
  • Brazilian. Gomide, P. I. C., et al. (2016). Paidéia 26(65), 291–298, cited by Alsalem A/HRC/53/36 fn 27: women accused of PA in 66% of cases, men in 17%. Gendered-allegation pattern from adjudicated cases, not population prevalence.
  • Canadian. Neilson, L. C. (2018). Parental Alienation Empirical Analysis (FREDA Centre, Vancouver). Alsalem fn 23: "357 cases, 41.5 per cent involved assertions of domestic or child abuse, of which 76.8 per cent included alienation claims advanced by the alleged perpetrator." Case-file analysis, not population prevalence.

Summary. There is no published population-probability-sample PA prevalence study outside the US / Canada / UK Harman/Hine programme. The cross-national literature is dominated by clinic, court, college, and case-file samples — useful for triangulation, not defensible as population prevalence.

9. Bentley & Matthewson (2020) — qualitative Australian work, not prevalence

Citation. Bentley, C., & Matthewson, M. (2020). The not-forgotten child: Alienated adult children's experience of parental alienation. The American Journal of Family Therapy, 48(5), 509–529. https://doi.org/10.1080/01926187.2020.1775531 — URL: https://www.tandfonline.com/doi/full/10.1080/01926187.2020.1775531

Sample. n = 10 (eight female, two male) Australian adults who self-identified as having been alienated in childhood. Semi-structured interviews, 60–90 minutes; Braun & Clarke reflexive thematic analysis; seven themes identified.

Why it appears here. Bentley & Matthewson is sometimes cited in advocacy material as "Australian prevalence data." It is not. It is a small-n qualitative interview study. It provides rich descriptive evidence of sequelae in already-affected individuals, not a population-level frequency claim. The honest citation is qualitative-sequelae, not prevalence.

10. The Harman & Lorandos vs. Meier exchange

This is the central scholarly battle over PA in family courts. It is not strictly a prevalence dispute, but it bears on every prevalence claim that gets used in litigation.

10.1 Meier (2019) — the original study

Citation. Meier, J. S. (2020). U.S. child custody outcomes in cases involving parental alienation and abuse allegations: What do the data show? Journal of Social Welfare and Family Law, 42(1), 92–105. https://doi.org/10.1080/09649069.2020.1701941 (and Meier, J. S., Dickson, S., O'Sullivan, C., Rosen, L., & Hayes, J. (2019). Child Custody Outcomes in Cases Involving Parental Alienation and Abuse Allegations — NIJ-funded report). Findings: courts that credit alienation claims discount abuse allegations; mothers alleging child abuse and PA is asserted against them lose custody at high rates.

10.2 Harman & Lorandos (2021) — the critique

Citation. Harman, J. J., & Lorandos, D. (2021). Allegations of family violence in court: How parental alienation affects judicial outcomes. Psychology, Public Policy, and Law, 27(2), 184–208. https://doi.org/10.1037/law0000301 — [secondary verification only] for verbatim text. Their claim: "many inaccurate and misleading statements" in Meier; "at least 30 conceptual and methodological problems."

10.3 The published exchange

  • Meier, J. S., Rosen, L., Dickson, S., O'Sullivan, C., & Hayes, J. (2022). The trouble with Harman and Lorandos' parental alienation allegations in family court study (2020). Journal of Family Trauma, Child Custody & Child Development, 19(3–4), 213–248. https://doi.org/10.1080/26904586.2022.2036286
  • Meier, J. S., et al. (2022). Harman and Lorandos' false critique of Meier et al.'s family court study. Journal of Family Trauma, Child Custody & Child Development, 19(2), 92–135. https://doi.org/10.1080/26904586.2022.2086659

Meier et al.'s verbatim characterisation: Harman and Lorandos' work is "agenda-driven, filled with error, and does more to obfuscate the issues than to shed light on courts' practices."

10.4 What the exchange means for prevalence claims

The fight is not "does PA exist" — both sides accept that PA-pattern behaviour occurs. The fight is over (a) the comparative frequency of false abuse allegations versus weaponised alienation claims, and (b) whether courts systematically over- or under-credit each. There is no consensus on either. Advocates citing either Meier or Harman & Lorandos as "settled" overstate; the literature is contested.

11. UN OHCHR / Alsalem A/HRC/53/36 on the empirical basis

11.1 Citation

UN General Assembly. (2023). Custody, violence against women and violence against children — Report of the Special Rapporteur on violence against women and girls, its causes and consequences, Reem Alsalem. A/HRC/53/36. Geneva: Human Rights Council, 53rd session. https://www.ohchr.org/en/documents/thematic-reports/ahrc5336-custody-violence-against-women-and-violence-against-children — PDF: https://documents.un.org/doc/undoc/gen/g23/070/18/pdf/g2307018.pdf

11.2 What the report says about the empirical basis of PA (verbatim, paras 9–11)

"9. There is no commonly accepted clinical or scientific definition of 'parental alienation'. Broadly speaking, parental alienation is understood to refer to deliberate or unintentional acts that cause unwarranted rejection by the child towards one of the parents, usually the father.

  1. The pseudo-concept of parental alienation was coined by Richard Gardner, a psychologist, who claimed that children alleging sexual abuse during high conflict divorces suffer from 'parental alienation syndrome' caused by mothers who have led their children to believe that they have been abused by their fathers and to raise allegations of abuse against them. He recommended draconian remedies to address the syndrome, including a complete cut-off from the mother in order to 'deprogramme' the child. It was argued that the more that children rejected the relationship with their fathers, the more evidence of the alienating syndrome was observed.

  2. Gardner's theory has been criticized for its lack of empirical basis, for its problematic assertions about sexual abuse and for recasting abuse claims as false tools for alienation, which, in some cases, have dissuaded evaluators and courts from assessing whether abuse has actually occurred. It has been dismissed by medical, psychiatric and psychological associations, and in 2020 it was removed from the International Classification of Diseases by the World Health Organization. Nevertheless, it has gained considerable traction and has been widely used to negate allegations of domestic and sexual abuse within family court systems on a global scale."

11.3 The report's specific empirical claims about how PA is used

  • (para 13, citing Neilson 2018): "An empirical analysis of parental alienation cases in Canada conducted in 2018 found that of 357 cases, 41.5 per cent involved assertions of domestic or child abuse, of which 76.8 per cent included alienation claims advanced by the alleged perpetrator."
  • (para 14): "A study in Brazil found that women were accused of parental alienation in 66 per cent of cases, as opposed to 17 per cent of cases where a man was accused, and men made more unfounded accusations than women."

11.4 What the report does not engage with

The Alsalem report does not engage in detail with the Harman 2016 / 2019 prevalence figures, the Verrocchio outcomes literature, or the Saini middle-position critique. Its critique of PA is conceptual / forensic-misuse rather than a methodological dissection of the prevalence numbers. The PA-recognition camp has used this as grounds to argue the report is one-sided; the camp critical of PA argues it is a faithful summary of the conceptual problems.

11.5 The institutional landscape

  • WHO ICD-11 removal: The "parental alienation" code that had appeared transiently in ICD-11 drafts was removed in February 2020; see Alsalem report and WHO ICD-11 release notes.
  • GREVIO (Council of Europe): Has cautioned against systematic use of PA in custody decisions involving DV allegations; specific GREVIO document on PA prevalence is not publicly confirmed at compilation.
  • APA (American Psychological Association): Has issued cautions about over-application of PA concepts; the APA does not endorse a specific prevalence figure.

12. Forensic implications — does "1% / 740,000" survive Daubert/Frye?

The Bernet 740,000 figure is regularly cited in expert testimony and amicus briefing. Its Daubert / Frye exposure:

  • Daubert factors: (1) tested → no, it is a deduction not a measurement; (2) peer-reviewed → the underlying chapter is peer-reviewed but the specific numerical derivation has not been replicated by independent researchers using primary data; (3) known error rate → not characterised; (4) general acceptance → contested (Saini et al. 2016 explicitly: "no defensible estimates").
  • Frye general-acceptance: the figure is widely cited within the PA-recognition camp but is not generally accepted in the broader family-court-research community, as Saini et al. demonstrates.

The Saini et al. 2016 statement that "to date there are no defensible estimates of the prevalence of parental alienation" is the strongest peer-reviewed authority for cross-examining any expert who cites 740,000 or 1% as established fact.

The Harman 2016/2019 poll figures (13.4% / 35.5% / 39.1% / 22 million) have a stronger Daubert profile (real measurement, real sample, peer-reviewed, published methods) but the authors themselves note (§3.6 above) that "many parents believe they are targets of parental alienation but may not fully understand what the term means." A competent cross-examiner can use the authors' own caveats to limit what the numbers can support.

13. What would a defensible prevalence study look like?

Contributor-invitation content. The literature converges on these elements:

  1. Probability sample from a defined population census frame (not online-panel or convenience).
  2. Operational definition registered in advance — specifying which behaviours count, severity threshold, duration, and how to distinguish PA from estrangement, alignment, age-appropriate preference, and normal divorce conflict.
  3. Validated instrument — psychometrically tested with reported sensitivity, specificity, and inter-rater reliability against an external standard. The Baker Strategy Questionnaire is the strongest current candidate but has not been benchmarked at threshold against clinically-determined cases.
  4. Multi-informant cross-check — child, both parents, neutral observer.
  5. Longitudinal design — minimum 12 months to distinguish pattern from transient conflict; ideally 5+ years.
  6. Cross-validation against legal/clinical records with appropriate consent.
  7. Comparison groups — intact-family conflict, post-divorce non-alienating, post-divorce with documented child abuse/IPV, post-divorce with estrangement, post-divorce with PA.
  8. Pre-registered analysis plan to prevent garden-of-forking-paths effects.
  9. Power analysis — detecting rare-event prevalence (~1%) at 95% CI of ±0.25% requires N ≈ 6,000 with the simplest design.

No such study exists — not because the field is incompetent, but because the design is expensive (estimated ~$3–8M), institutionally awkward (requires court-record linkage in jurisdictions resistant to research access), and politically charged (no funder has stepped up). A funded version would settle most of the prevalence dispute. AntiAlienate's position: this is the highest-value single research investment the field could make.

14. Synthesis — confidence levels by claim category

High confidence

  • PA-pattern behaviour occurs and is recognised by professionals across both pro-recognition and middle-position camps. Saini et al. (2016, p. 422): "respondents recognized the lack of sound research to support the concept, although they acknowledged the existence of alienation dynamics within the child custody field generally and in their caseloads specifically."
  • Children and adults affected by sustained PA-pattern behaviour show measurable elevations in depression, anxiety, PTSD symptoms, suicidality — across multiple study designs (Verrocchio 2015, 2016; Bernet, Baker & Verrocchio 2015; Verhaar, Matthewson & Bentley 2022; Harman 2019; Hine 2026 UK).
  • The PA construct is not adequately distinguished from estrangement / alignment / age-appropriate preference / IPV-exposure-rejection in the published literature using validated instruments.

Moderate confidence

  • In high-conflict divorce cases that reach the courts, PA-pattern dynamics are present in a substantial minority of cases — clinical and case-file estimates cluster around 20–40% of contested-custody cases (Johnston 1993, 2003; Bala, Hunt & McCarney 2010; Neilson 2018), with wide variation by jurisdiction and case-selection.
  • The Italian and Australian qualitative literature provides robust descriptive evidence of severe sequelae in those affected (Verhaar 2022 n=20; Bentley & Matthewson 2020 n=10), at a level of detail consistent with the construct describing a real phenomenon.

Low confidence

  • Any specific population-prevalence percentage for PA in the general population. Saini et al. (2016) verbatim: "to date there are no defensible estimates of the prevalence or incidence of the problem."
  • The Bernet 1% / 740,000 figure as a measurement (it is a back-of-envelope deduction, not a measurement).
  • The "22 million parents" extrapolation without the question-wording dependence flagged.
  • The 75% / 98.3% / 59% / 39% figures without the operational-definition breadth disclosed.

Very low confidence / contested

  • Cross-jurisdictional generalisability of any prevalence figure (no non-Anglo population-probability study exists).
  • Comparative-frequency claims that "PA is more common than false abuse allegations" or vice versa (Harman/Lorandos vs Meier exchange — unresolved).

15. Honest framing for advocates

Acceptable framings

  • "Bernet (2010) estimated approximately 740,000 US children may be affected by PA — derived by multiplying ~20% of children in separated households × ~25% in high-conflict disputes × ~25% who become alienated. A probability estimate, not a measurement."
  • "Harman et al. (2016) found in the first US representative-poll that 13.4% of US parents reported feeling targeted by PABs, extrapolating to ~22 million. Their 2019 three-poll follow-up produced higher figures (35.5% US / 32% Canada / 39.1% non-reciprocating US). The authors caution these are self-reports of feeling targeted, not measurements of confirmed alienation."
  • "Hine, Harman et al. (2025) found that depending on question-wording, between 39% and 59% of UK separated parents reported PAB exposure, with 36.5% non-reciprocal targets. The range itself is the most important finding."
  • "Saini, Johnston, Fidler & Bala (2016), reviewing 58 empirical studies using GRADE-adapted criteria, concluded: 'to date there are no defensible estimates of the prevalence of parental alienation.'"

Unacceptable framings

  • "Parental alienation affects 740,000 US children" (without "estimated").
  • "1% of US children are alienated" (treated as established epidemiology).
  • "22 million US parents are alienated" (without "feel they are targeted by alienating behaviours").
  • "98% of UK young adults experienced parental alienation" (Hine 2026's 98.3% is "at least one PAB-listed behaviour," not PA).
  • Any prevalence figure without disclosing the operational definition behind it.

The strongest defensible framing

"The PA literature has not yet produced a defensible population-prevalence estimate — Saini, Johnston, Fidler & Bala (2016) flagged this and the gap remains. What is established with high confidence is that PA-pattern behaviour occurs, that in those affected it produces measurable elevations in depression, anxiety, PTSD symptoms, and suicidality (Verhaar 2022; Verrocchio 2015, 2016; Bernet et al. 2015; Harman 2019; Hine 2026), and that no validated population study has been funded. The most important next step is a properly designed prevalence study; we advocate for it."

Appendix — Primary-source URLs at one glance

  • Harman, Leder-Elder & Biringen (2019), three polls: https://doi.org/10.1016/j.childyouth.2019.104471 (open PDF: https://childrightsngo.com/newdownload/downloadsection7/Research%20PA%20effects%20adulthood%20of%20children%20Harman%20Leder%20Elder%20&%20Biringen%202019%20IMP.pdf)
  • Harman, Leder-Elder & Biringen (2016), NC poll: https://doi.org/10.1016/j.childyouth.2016.04.021
  • Hine, Harman, Leder-Elder & Bates (2025), UK separated parents: https://link.springer.com/article/10.1007/s10896-025-00910-4
  • Hine, Harman, Leder-Elder & Bates (2026), UK 18–25: https://doi.org/10.3389/fpubh.2026.1803173
  • Bernet, von Boch-Galhau, Baker & Morrison (2010), DSM-V / ICD-11: https://doi.org/10.1080/01926180903586583
  • Bernet, Baker & Verrocchio (2015), SCL-90-R Italian: https://doi.org/10.1111/1556-4029.12681 — https://pubmed.ncbi.nlm.nih.gov/25613416/
  • Verrocchio, Marchetti & Fulcheri (2015): https://doi.org/10.3389/fpsyg.2015.01760
  • Verrocchio, Baker & Bernet (2016): https://doi.org/10.1111/1556-4029.13046 — https://pubmed.ncbi.nlm.nih.gov/27122408/
  • Saini, Johnston, Fidler & Bala (2016): https://doi.org/10.1093/med:psych/9780199396580.003.0013 (open PDF: https://nvcourts.gov/__data/assets/pdf_file/0021/43941/Session_2-_Saini_Johnston_Fidler_Bala_Alienation_2016.pdf)
  • Templer, Matthewson, Haines & Cox (2017): https://doi.org/10.1111/1467-6427.12137
  • Bentley & Matthewson (2020): https://doi.org/10.1080/01926187.2020.1775531
  • Harman & Lorandos (2021): https://doi.org/10.1037/law0000301
  • Meier et al. (2022) "Trouble with H&L": https://doi.org/10.1080/26904586.2022.2036286
  • Meier et al. (2022) "False critique": https://doi.org/10.1080/26904586.2022.2086659
  • Alsalem A/HRC/53/36: https://www.ohchr.org/en/documents/thematic-reports/ahrc5336-custody-violence-against-women-and-violence-against-children (PDF: https://documents.un.org/doc/undoc/gen/g23/070/18/pdf/g2307018.pdf)
  • Neilson (2018) FREDA report on Canadian PA cases: cited by Alsalem fn 23.
  • Gomide et al. (2016) Brazilian study: Paidéia 26(65), 291–298, cited by Alsalem fn 27.

End of evidence page. Maintained under CC BY 4.0. Corrections, additional primary sources, and especially direct verification of the verbatim Bernet (2010) 740,000 derivation are invited via pull request to the AntiAlienate knowledge repository.