How Common Is Parental Alienation in the UK? The Hine 2025 Prevalence Study

Love Over Exile is a plain-language research archive on parental alienation, written by Malcolm Smith — an alienated parent and author of the forthcoming book Love Over Exile — for non-specialist readers (other alienated parents, family members, therapists, lawyers) who want to understand the evidence base without a psychology degree or a journal subscription. This page is one entry in that archive.

What the Researchers Asked

How common is parental alienation in the United Kingdom?

For most of the post-2000 PA research literature, that question had no UK-specific answer. The prevalence numbers cited in UK family-court submissions, Cafcass training materials, FJC guidance documents, and policy advocacy were almost all imported from US data — primarily the Harman, Leder-Elder & Biringen (2019) “22 million parents” study. UK practitioners often had to caveat with “this is US data, but plausibly applies here” in court reports.

That gap mattered for three reasons. First, the UK family-court system is structurally different from the US — single-judge specialist family courts, Cafcass-driven welfare reporting, no jury trials, no large-scale appellate-records substrate. Second, UK domestic-abuse policy had been developing fast through the 2021 Domestic Abuse Act, the 2024 Cafcass Domestic Abuse Practice Pathway, and the December 2024 Family Justice Council Guidance on alienating behaviours. Third, advocacy and counter-advocacy on both sides of the UK conversation needed UK-specific numbers to engage credibly with policymakers.

Hine, Harman, Leder-Elder and Bates’s 2025 paper in Journal of Family Violence is the answer. It pairs UK domestic-abuse expertise (Hine and Bates) with US PA-prevalence methodology (Harman and Leder-Elder, the team behind the 2016 North Carolina poll and the 2019 three-poll US/Canada extension). Funded by the Sir Halley Stewart Trust, with charity-partner recruitment from Match Mothers and Dads Unlimited, it surveyed 1,005 separated or divorced UK-resident parents.

The research questions are narrow and policy-relevant.

How prevalent are parental alienating behaviours in the UK separated-parent population? How does the UK figure compare to the US? What is the mental-health cost to UK targeted parents? How often do PABs co-occur with other forms of intimate-partner abuse? And — applying the strict Bernet-Lorandos-Baker-Reay Five-Factor Model — how many UK children meet the full clinical threshold for alienation?

Behind those questions sits a broader policy reframing. If parental alienating behaviours are widespread in the UK, mental-health-damaging, and co-occur with other recognised forms of IPV, then the December 2024 FJC Guidance is on solid empirical ground when it treats alienating behaviours as a form of psychological abuse. The Hine 2025 paper is the empirical floor under that policy moment.

What They Did — Methods in Plain English

The methodological design is the paper’s strongest feature.

The team paired UK domestic-abuse research expertise with the US PA-prevalence methodology that produced Harman 2019. The US team brought the 30-item behavioural inventory and the non-reciprocating-targets construct; the UK team brought the recruitment infrastructure, the UK-specific contextual measures, and the policy-relevant framing.

Attribute	Value
Source	Cross-sectional self-report online survey
Sample size	1,005 separated or divorced UK-resident parents
Recruitment	University of West London + Match Mothers (UK charity for mothers separated from their children) + Dads Unlimited (UK charity for fathers in family-court contexts)
Inclusion criteria	Self-identified UK-resident separated/divorced parent, aged 18+, with at least one child from the relationship
Direct measure	Single-item self-report: “Has your ex-partner tried to turn your child(ren) against you?”
Behavioural measure	30-item Parental Alienating Behaviours inventory derived from Harman’s US instrument family, conceptually anchored in Baker’s 17-strategies framework
Reciprocity filter	Identifies parents who report receiving PABs without engaging in them themselves (non-reciprocating targets)
Child-side measure	Bernet-Lorandos-Baker-Reay Five-Factor Model (5 diagnostic criteria)
Mental-health measures	Standard self-report scales for depression, PTSD symptoms, suicidal ideation
Other-IPV measure	Established intimate-partner-abuse and coercive-control inventories
Pre-publication launch	25 April 2024 (International PA Awareness Day) at UWL
Publication	Journal of Family Violence 2025 (advance online publication)
Funding	Sir Halley Stewart Trust

The two-measurement-approach design is what produces the 39%-59% range. The direct single-item question captures parents who already label their experience as alienation; the behavioural inventory captures parents who report the underlying actions but have not yet adopted the label.

The convergence on a tight middle figure — 36.5% non-reciprocating targets — is the signal. It is the construct directly comparable to Harman 2019’s 39.1% US figure.

The Five-Factor Model layer is the second methodological anchor. Bernet, Lorandos, Baker and Reay’s diagnostic framework requires all five criteria to be present simultaneously: (1) the child shows refusal or rejection of one parent, (2) there is a prior positive relationship with that parent, (3) there is no abuse or neglect by the rejected parent that would justify the rejection, (4) the favoured parent has used multiple alienating behaviours, and (5) the child shows the well-known behavioural manifestations of alienation.

Of the targeted-parent UK subgroup, 96.7% report at least one manifestation. When all five factors are required, the rate drops to 2.9% of the full sample.

The exposure-versus-outcome split is the same one Bernet & Greenhill (2022) made for the US data. It is essential to keep the two figures separate.

The big number describes parental experience of alienating behaviours. The small number describes children who have actually crossed the clinical threshold into full alienation.

Hine 2025 (UK) vs Harman 2019 (US) — the international prevalence pair

The comparison between the two papers is the most important contextual point. Citing both as a pair is the responsible move whenever any LOE article makes a generalisable claim about how common PA is in the English-speaking world.

Dimension	Harman 2019 (US/Canada)	Hine 2025 (UK)
Sample frame	Three YouGov panels, US 2014/Canada 2015/US 2016	UK separated/divorced parents 2023-2024
Sample size	Combined N=1,264 parents across three polls	N=1,005 separated UK parents
Recruitment	YouGov probability-matched panels, Census-weighted	Charity-partner recruitment via UWL + Match Mothers + Dads Unlimited
Inclusion criterion	Adult parents with custody history	Self-identified separated/divorced UK parent
Direct-measure rate	35.5% (US 2014) / 32% (Canada 2015)	39.2%
Behavioural-measure rate	Implied via 39.1% Poll 3	59.1%
Non-reciprocating-target rate	39.1% (US Poll 3)	36.5%
Five-Factor strict-threshold rate	~1.3% of full population	2.9% of sample
Extrapolated affected children	~3.8 million US children	~110,200 UK children
Mental-health impact	Elevated depression, trauma, suicidality (~23% suicidality)	Elevated depression, PTSD, suicidal ideation
Co-occurring IPV measured	Implied	Yes, explicitly
Funding	Author funded	Sir Halley Stewart Trust

The non-reciprocating-target rate is 36.5% UK vs 39.1% US — within three percentage points across the Atlantic, ten years apart, on different sampling frames. This is the strongest cross-national replication evidence available for parental alienation prevalence research.

The exposure-vs-outcome funnel, drawn to scale

The figure below puts the four UK headline numbers — 59.1% behavioural exposure, 36.5% non-reciprocating targets, 96.7% any-manifestation, 2.9% strict-Five-Factor — in scale alongside the ~110,200 children extrapolation.

What They Found — Six Key Findings

1. The 39%-59% headline range — UK separated parents experiencing PABs

The first headline finding is the prevalence range itself. When asked directly — “has your ex tried to turn your child against you?” — 39.2% of 1,005 separated UK parents say yes.

When the question is decomposed into the 30-item behavioural inventory, the rate rises to 59.1%. The two measurements bracket the UK prevalence figure: somewhere between two-fifths and three-fifths of separated UK parents experience alienating behaviours from the other parent.

The range is not a methodological weakness — it is a methodological feature. The direct question captures parents who already name their experience as alienation; the behavioural inventory captures parents who report the underlying actions without yet using the label. The convergence on a tight middle figure of 36.5% non-reciprocating targets is what stabilises the estimate.

For UK plain-English use, “39%-60% of separated UK parents experience alienating behaviours” is defensible; “around two in five” or “around half” works for register-appropriate framing.

2. UK 36.5% non-reciprocating targets — within three points of US 39.1%

The most important comparative finding is the cross-national convergence.

The non-reciprocating-target construct is the strict version of the prevalence question — the share of separated parents who report receiving alienating behaviours without engaging in them themselves. It excludes high-conflict cases where both parents alienate each other.

In Hine 2025, the UK figure is 36.5%. In Harman, Leder-Elder & Biringen 2019, the US figure is 39.1%.

Two independent samples on different sides of the Atlantic, ten years apart, using fundamentally different recruitment frames — Harman 2019 used Census-weighted YouGov panels, Hine 2025 used charity-partner recruitment — and they converge within three percentage points.

This is the strongest cross-national replication evidence available for parental alienation prevalence research. It is the closest the literature has come to demonstrating that PA-target prevalence among separated parents is a stable cross-national phenomenon in the English-speaking Global North, not an artefact of a single sample or jurisdiction.

3. 96.7% any manifestation — but 2.9% meet the full clinical threshold

The exposure-versus-outcome split is the finding most often misread.

Of the targeted-parent UK subgroup, 96.7% report at least one manifestation of alienation in their child — for example, the child shows reluctance, denigrates the targeted parent, parrots the other parent’s complaints. This is a very high number because the threshold is loose: any single manifestation counts.

When all five Bernet-Lorandos-Baker-Reay Five-Factor Model criteria are required simultaneously — refusal/rejection, prior positive relationship, no abuse/neglect by the rejected parent, multiple alienating behaviours by the favoured parent, and the full constellation of behavioural manifestations in the child — the figure drops to 2.9% of the full sample.

The factor of difference is roughly 33-fold. Most targeted UK parents see at least one manifestation. Far fewer see all five.

The exposure-versus-outcome split is the same one Bernet and Greenhill drew for the US data in 2022, and the same one Harman 2019 marked between the 39.1% targeted figure and the 1.3% fully-alienated figure. It is essential to keep the two figures separate in any UK policy or advocacy use.

4. Roughly 110,200 UK children meet the full alienation threshold

Applying the 2.9% rate to the approximately 3.8 million UK children in separated families produces an estimate of roughly 110,200 UK children meeting all five Five-Factor Model criteria.

The figure is the UK analogue to the US 1.3% / 3.8 million children estimate from Harman 2019. The UK figure is smaller than the US figure not because UK alienation rates are lower — the targeted-parent rates are within three percentage points — but because the UK has a smaller absolute population.

The 110,200 figure is appropriate for citation in advocacy work, policy submissions, and family-court statements. It is the clinical-threshold figure, not the exposure-to-behaviours figure. Any UK source citing “1.5 million UK children affected by parental alienation” or “10% of UK children alienated” is mixing the exposure and outcome layers and does not reflect what Hine 2025 actually shows.

The two-figure framing — 36.5% targeted parents AND 110,200 fully alienated children — is the responsible UK headline.

5. UK targeted parents — depression, PTSD, suicidal ideation

The mental-health impact mirrors the US data.

UK targeted parents — particularly those scoring high on the 30-item behavioural inventory — show elevated rates of depression, PTSD symptoms, and suicidal ideation on standard self-report scales. The directional finding is robust across all open-access summaries of the paper. The specific clinical-scale percentages are behind the Springer paywall and are not yet recoverable from secondary sources.

The pattern is consistent with the 23% suicidality figure from the US 2019 prevalence paper. UK targeted parents are not a less-affected population than their US counterparts — the cross-national replication of the mental-health cost is as important as the replication of the prevalence rate.

The finding has direct implications for UK clinical practice. UK targeted parents presenting to GPs, NHS mental-health services, or family-court welfare reports are not a small or marginal population; they are a measurable share of the UK separated-parent population, with documented elevated risk of clinically significant mental-health outcomes.

6. PABs co-occur with other intimate-partner abuse

The sixth finding is the policy-load-bearing one.

UK targeted parents who report higher levels of parental alienating behaviours also report significantly higher levels of other forms of intimate-partner abuse — coercive control, psychological abuse, financial abuse, and physical or sexual violence. The two patterns co-occur in the same households.

This supports the Harman, Kruk & Hines (2018) classification of PABs as a form of family violence, not a stand-alone phenomenon. It also supports the position taken in the December 2024 Family Justice Council Guidance that alienating behaviours can themselves be a form of psychological abuse and should be assessed alongside, not in opposition to, domestic-abuse allegations.

The implication for Cafcass and family-court practice is direct. Treating PABs and IPV as competing or mutually exclusive categories — a pattern observed in some UK welfare reports — does not match the empirical co-occurrence pattern. The co-occurrence finding aligns with the Sharples, Harman & Lorandos (2025) appellate-cases evidence on direction-of-abuse and with the broader family-violence framing.

Why This Matters

A UK prevalence paper does three kinds of work — and Hine 2025 does all three.

First, it closes a long-standing gap in the UK literature. UK family-court submissions, policy advocacy, and Cafcass training materials had been citing US figures with a “plausibly applies here” caveat for two decades. Hine 2025 makes the caveat unnecessary for the prevalence question.

Second, it positions UK PABs squarely within the domestic-abuse framework. The co-occurrence with other IPV, the elevated mental-health cost, and the strict-clinical-threshold figure of 110,200 UK children are the empirical floor under the December 2024 FJC Guidance and the parallel Cafcass Domestic Abuse Practice Pathway updates.

Third, it validates the international generalisability of the PA-prevalence research programme. The 36.5% UK / 39.1% US convergence is the strongest cross-national replication available. The finding makes it harder to dismiss US-derived prevalence estimates as nation-specific artefacts.

The implications play out in three overlapping directions.

For UK family-law practice, Hine 2025 is the citation that anchors any client statement, court report, or expert witness submission that needs to establish the prevalence and severity of PABs in the UK context. The 36.5% non-reciprocating-target figure and the 110,200-children clinical-threshold figure are both appropriate for citation, with the caveat that they describe the UK separated-parent population, not the broader UK custody-disputing population.

For UK policy and Cafcass practice, the co-occurrence finding is the load-bearing point. PABs and other forms of IPV are not competing categories; they overlap in the same households. Welfare reports, custody recommendations, and protective orders need to assess both, not one or the other.

For UK targeted parents, the prevalence figure is the answer to “is what is happening to me a UK-specific recognised pattern?” Yes. You are in the company of roughly two-in-five UK separated parents — somewhere between several hundred thousand and over a million UK adults, depending on the threshold — experiencing alienating behaviours from a former partner. The 110,200-children figure is the strict clinical-threshold subset; the larger number describes the experience.

What This Means for You

The practical weight of a UK prevalence paper depends on what you do with it.

If you are a targeted UK parent. Hine 2025 gives you a UK-specific citation that family-court professionals, Cafcass officers, and therapists recognise. Saying “my ex is engaging in parental alienating behaviours” used to require US data and a caveat; now it sits within a UK national prevalence study with 1,005 respondents, depression and PTSD impact data, and a co-occurrence finding with other forms of IPV.

The 36.5% / 110,200 framing also defuses the most common gaslighting your ex’s legal team will deploy: that PA is a “fringe” or “American” concept that does not apply in the UK. It is none of those things; it is a documented UK pattern affecting roughly two-in-five separated UK parents.

If you are a UK lawyer or therapist reading this. Hine 2025 is the citation that anchors UK-specific PA work. The three figures most appropriate for citation are:

• 39.2% / 59.1% range for parental experience of alienating behaviours
• 36.5% non-reciprocating targets for the strict targeted-parent construct
• 2.9% / 110,200 children for the strict clinical-threshold figure

Pair the citation with Harman, Kruk & Hines (2018) for the family-violence classification and the Five-Factor Model (Bernet & Greenhill, 2022) for the diagnostic threshold. The three-paper triad covers prevalence, classification, and diagnosis in the UK context.

If you are a Cafcass officer, family-court welfare reporter, or judicial training coordinator. The co-occurrence finding is the most policy-relevant point. PABs and other forms of IPV co-occur; UK welfare assessments need to address both. The December 2024 FJC Guidance is consistent with the empirical pattern Hine 2025 documents — alienating behaviours are not a category that competes with domestic abuse but one that frequently sits alongside it.

The UK literature does not yet contain a study that evaluates Cafcass decision-making against the Hine 2025 prevalence baseline. That remains an open methodological question.

If you are a policy professional or family-law reformer. The 110,200-UK-children figure is the practical advocacy number. It is the strict-clinical-threshold figure, not the exposure-to-behaviours figure. Citing it as “110,200 UK children meeting the full clinical threshold for parental alienation” is responsible; citing it as “110,200 UK children experiencing alienating behaviours” understates the actual exposure pattern.

A reform agenda built on the Hine 2025 figures will be more durable than one built on US imports — UK policy makers respond to UK-specific data.

Limitations — What the Study Doesn’t Tell Us

Three honest limitations, named plainly.

First, the recruitment frame is a large UK convenience sample, not a probability-sampled YouGov-style panel. Charity-partner recruitment via Match Mothers and Dads Unlimited captures parents who are already engaged with separation-support charities. Self-selection toward parents motivated to respond to a PA-related survey is plausible.

The sampling frame is closer to a large engaged-population survey than to the Census-weighted national poll Harman 2019 used in the US. The convergence with the US figure (36.5% UK vs 39.1% US) suggests the recruitment effect is small, but it cannot be ruled out.

Second, all measurement is self-report. Targeted parents report on their own experience, on their child’s behaviour, and on their own mental health. There is no corroboration from the other parent, the child, the family-court system, or any third party.

This is the same limitation as the US 2019 paper. It is a genuine methodological constraint of the entire prevalence-research-via-survey approach. A future UK study could improve on this by using dyadic measurement (the same questions asked of both parents) or by linking survey responses to Cafcass records.

Third, the paper does not evaluate Cafcass decisions or family-court outcomes. It establishes the empirical floor under UK PA policy — but it does not directly test how Cafcass officers, family-court judges, or contact-centre practitioners actually respond to PAB allegations or findings.

That question — “given that PABs are this prevalent and this damaging, is the UK family-court system identifying and responding appropriately?” — remains an open methodological gap in the UK PA literature. A natural follow-up study would mirror the Sharples, Harman & Lorandos (2025) appellate-records analysis on UK family-court records, but the public-record substrate in the UK is much thinner than in the US.

Several methodological details are behind the Springer paywall and not yet recoverable from open sources. Items flagged for verification when full-text access becomes available include:

• Specific clinical-scale percentages for depression, PTSD, and suicidality
• Gender-split breakdowns for the 39.2% / 59.1% / 36.5% figures
• Specific co-occurrence rates with each named form of IPV
• Effect-size confidence intervals
• The exact recruitment platform (Prolific, Qualtrics, charity mailing list, or mix)

The directional findings (39.2% / 59.1% / 36.5% / 96.7% / 2.9% / 110,200) are robust across all open-access summaries; confidence in any specific sub-analysis requires the full paper.

None of these limitations is a reason to discard the paper. They are reasons to cite it precisely — Hine, Harman, Leder-Elder & Bates (2025) for UK separated-parent prevalence; Harman, Leder-Elder & Biringen (2019) for the directly comparable US figure; Bernet & Greenhill (2022) for the diagnostic threshold the 2.9% figure is filtered through. The aim of a good article about a paper is to leave the reader better able to cite it well. That is the aim of this one.