RCTChild: care, health and development2025

The Indirect Effect of a Brief Couple Intervention on Child Mental Health Challenges via the Interparental Relationship.

Maya Koven, Jazzmin Demy, Jasmine Zhang and 2 others

PMID 41258348

WHAT IT FOUND

A brief online writing exercise for couples improved their relationship quality but did not reduce their children's mental health challenges.

Therapists should not expect this couple-focused intervention to produce immediate secondary benefits for child emotional or behavioural symptoms.

Key findings

01The intervention improved couple relationship quality but failed to significantly reduce child mental health challenges at follow-up.

02Improved relationship quality was not significantly linked to better child outcomes, and the intervention did not reduce couple conflict.

03Child mental health scores were highly stable over time, making them difficult to predict from short-term relationship changes.

STILL TO COME

How it was doneWhat they found

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What it does not show

All data, including child mental health symptoms, relied on parent report, which may introduce bias. The sample was highly educated and predominantly white, limiting how well the results apply to other groups. The child mental health measure used three different versions depending on the child's age, making it difficult to compare scores across the group. The study did not measure destructive conflict behaviours like hostility or disengagement, which are more strongly linked to child outcomes. The intervention was brief and virtual, which may not be enough to create changes in a child's environment or internal state.

Declared interests

The authors declared no conflicts of interest. The study was funded by the Canadian Institutes of Health Research and the Social Sciences and Humanities Research Council.

The easy way to misread this

Do not assume that improving a couple's relationship quality will automatically reduce their child's mental health symptoms. This study found that even though the intervention worked for the parents, it had no significant effect on the children's emotional or behavioural challenges.

Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →


The study

Participants
140 couples (267 individuals)
Certainty of evidence
Moderate

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    Cite

    Maya Koven, Jazzmin Demy, Jasmine Zhang, et al. The Indirect Effect of a Brief Couple Intervention on Child Mental Health Challenges via the Interparental Relationship. Child: care, health and development. 2025.

    Read the original — we summarise, we never replace the paper.