Research often finds that children sharing time between homes do as well as, or better than, children living mainly in one home. But that does not prove that a particular timetable causes better well-being. Here is what published studies can tell parents—and what they cannot.
A systematic review uses a stated method to find and compare studies. A 2023 review by Lara Vowels and colleagues brought together 39 studies published from 2010 to 2022, covering emotional, behavioural, relationship, physical-health and educational outcomes.
The overall pattern favoured shared physical care over living mainly or only with one parent, although findings and comparisons varied. In many analyses, children sharing care also had similar outcomes to children whose parents lived together.
The authors found the pattern most consistent with children retaining relationship and financial resources from both parents. That is an explanation supported by the pattern, not proof that moving a particular child into equal care will improve their health.
A study may compare children living mostly in one home with children spending substantial time in two. Even if one group reports fewer difficulties on average, children within each group can have very different experiences.
“Shared physical custody” or “shared residence” usually describes where children spend their time. It is not necessarily the same as shared authority over important decisions. Check how the study defines the arrangement before comparing it with your own.
When families choose their living arrangements, the groups being compared may already differ. Income, parental health, earlier involvement in care, distance between homes and exposure to conflict can all be relevant.
For example, two homes close to school with adults who can provide safe, consistent care are a different situation from two distant homes with serious safety concerns. If a study records only the label “two homes,” it may not capture what matters most in that difference.
Statistical adjustments can help account for measured differences. They cannot guarantee that every relevant difference was measured. A finding that two things occur together is therefore not, by itself, proof that changing the schedule will cause the same outcome.
In the 2023 review, none of the included studies had information on children’s outcomes before separation. Only two used longitudinal data, meaning repeated observations over time, and those observations were analysed separately. The review therefore could not establish how a change of living arrangement caused a change in well-being.
Studies also used different measures, and only two examined education. It would go too far to turn the overall results into a promise of better school performance or a preferred timetable for every age.
An earlier Norwegian Institute of Public Health review examined five studies of children aged 0–6, published between 1999 and 2016. Results varied, and the reviewers rated confidence in all the findings as very low because of study limitations.
That older review does not establish a blanket rule for or against overnight stays at a particular birthday. It shows why evidence about an age group and the child’s actual needs require careful attention.
“Two homes are always better” and “moving between homes always harms children” both go further than a group comparison can justify. Also ask whether the study included families facing violence, disability or other circumstances relevant to your child.
A personal story can show what an arrangement feels like. It does not tell us how common that experience is. A book based on interviews can be valuable without being a representative research study.
Instead of asking which label is best, look at specific needs:
A timetable is only one part of care. A safety concern needs an appropriate professional response; it should not be dismissed because a research average looks reassuring.
This is a plain-language discussion of selected publications, not a new systematic review or an individual recommendation. Read the dates, population and limitations of any study used to support a major decision. A research average cannot determine whether a particular child is safe or thriving.
Based on the original article by Malin Bergström.
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