Attachment goes to court: Child protection and custody issues
Attachment & Human Development
Report summary
What does modern attachment research reliably tell family courts, and what remains disputed?
The international group agreed that children need familiar caregivers who are safe, benefit from continuity of adequate care, and can benefit from important attachment relationships with several people. The experts disagreed about how much weight courts should place on formal attachment assessments in an individual case.
Recent international work distinguishes broad supported principles from claims that cannot validly determine an individual child’s arrangement.
Researchers' conclusions
The authors recommended focusing court assessment on caregiving behaviour and using attachment measures mainly to guide support, not determine custody in isolation.
This is a plain-language summary of the researchers' conclusion. It is not advice for an individual family.
How the report was produced
Consensus statements compare the reliability and limits of research tools with the far higher stakes of individual legal decisions.
What this paper supports
Reasonably supports
- Labelling policy evaluation, developmental outcome research, consensus, and commentary separately.
- Using group-level evidence as context rather than a substitute for individual facts.
- Evaluating implementation effects, exceptions, and unintended incentives.
- Requiring experts to explain inferential limits and competing evidence.
Does not establish
- Claiming professional approval proves improved child outcomes.
- Claiming one child-outcome association proves a legal presumption is optimal.
- Using an attachment measure in isolation to decide custody or protection.
- Presenting a selected group’s consensus as the end of scientific debate.
Important limitations
- Consensus statements integrate evidence but do not eliminate value judgments
- The authors explicitly retained disagreement on some assessment questions
- General principles cannot decide individual cases
Evidence context and debate
Open the sections below for the wider research context, points of agreement, and areas that remain contested.
Why this question matters
Courts and professionals have sometimes used attachment theory to claim that a child needs one primary attachment figure or to diagnose an individual family more confidently than the research allows.
Family-law research asks two linked but distinct questions: what arrangements are associated with child and family outcomes, and what happens when legal rules change professional behaviour. Developmental studies, policy evaluations, consensus statements, and legal commentary answer different parts of that picture and should not be combined as if they share one design.
The Arizona evaluation, for example, reports perceptions of judges, lawyers, mental-health providers, and court staff after a statutory change. It is informative about implementation, adversarial incentives, and reported conflict. It is not a direct measurement of children’s attachment, mental health, or long-term adjustment. Conversely, a developmental cohort may measure children well while saying little about how a legal presumption operates.
The court context also magnifies the cost of overstatement. Group averages do not identify the best arrangement for one child, and research instruments designed for population study may lack the sensitivity and specificity required for individual adjudication. The mature evidence base therefore stresses transparent inference, multiple sources of case evidence, and clear limits.
Where researchers agree and disagree
Experts broadly support familiar non-abusive caregivers, continuity of good-enough care, attachment networks, and careful attention to observable caregiving behaviour.
Experts openly disagree about whether formal attachment assessments should be used in individual court decisions and, if so, how much weight they should receive.
Comparison with other research
Fabricius et al., 2018
Reports professional evaluation of Arizona’s reform, including neutral perceived conflict effects and small increases in certain allegations. It is a policy-implementation study, not a child-outcome trial.
Warshak, 2017
Defends a consensus report and critiques what he describes as misinformation in professional translation. It reveals the scholarly dispute but adds no new family dataset.
Forslund et al., 2022
Sets out international consensus principles and explicitly records dissensus about attachment assessment, modelling how disagreement can remain visible.
Shared-custody outcome reviews
Provide background about average child outcomes but cannot by themselves establish which legal presumption will work best across jurisdictions.
How the evidence developed later
Policy studies increasingly examine how statutes affect bargaining, litigation, allegations, and professional practice.
Consensus work now states both common ground and unresolved dissensus.
Researchers have called for stronger quasi-experimental designs to separate policy effects from social change.
Court guidance increasingly emphasizes caregiving behaviour, safety, and relationship history over simplified attachment labels.
Read the paper and related research
This report
Forslund, Granqvist, van IJzendoorn, Sagi-Schwartz, Glaser, Steele, Hammarlund et al. (2022). Attachment goes to court: Child protection and custody issues. Attachment & Human Development, 24(1), 1–52. https://doi.org/10.1080/14616734.2020.1840762
See the shared-care evidence chain
Return to the evidence pathway and choose the next topic-specific research branch.
Record checked against the linked scholarly source. Last editorial review: 22 July 2026, as part of a batch review of the current collection.