What research reports about shared care
The outcome reviews, large population studies, common objections, and the limits of comparing families who chose different arrangements.
Do children in shared care generally do better, worse, or about the same?
Across reviews and large population studies, children in shared care generally have equal or somewhat better average outcomes than children living mainly with one parent. The average advantage is usually small. Most studies cannot prove that the arrangement caused the difference.
Start with these papers
These are the main papers supporting the answer above. Open a research record for the findings, limitations, full citation, and original publication.
Custody and living arrangements after parents separate: Implications for children and adolescents
Start with children's reported experiences of rules, routines, distance, exchanges, flexibility, belonging, friends, and activities.
We also communicate through a book in the diaper bag: Separated parents' ways to coparent and promote adaptation of their 1 to 4 year olds in equal joint physical custody
Read how families with young children actually handled different homes, communication, routines, and schedule changes.
Does shared parenting help or hurt children in high-conflict divorced families?
Read the mixed evidence showing why persistent conflict, parenting quality, and time since separation must be considered together.
When this guide is useful
Use this guide when shared care is described as generally harmful, destabilising, or unsuitable because a child has two homes.
The boundary to keep
These are group averages. They do not require shared care where there is violence, coercive control, abuse, neglect, serious caregiving difficulty, or practical circumstances that make the arrangement unsafe or unworkable.
Findings worth knowing
A 19-study analysis found a small average advantage
Baude and colleagues combined 19 studies. The overall result slightly favoured shared care, but family selection could explain part of the difference.
Baude, Pearson, and Drapeau, 2016: read the evidence recordThe 60-study review was mostly positive or neutral
Shared-care children did better on every measured outcome in 34 studies, better on some and equal on the rest in 14, and equally well in 6. The remaining 6 each contained one poorer result alongside equal or better results.
Nielsen, 2018: read the evidence recordNearly 150,000 adolescents reported fewer stress-related symptoms
Among separated families, children in shared care reported fewer sleep, headache, stomach ache, tension, sadness, and concentration problems than children living mostly or only with one parent.
Bergström and colleagues, 2015: read the evidence recordPreschool results did not show a two-home penalty
Parents and preschool teachers reported fewer psychological symptoms among shared-care children than among children living mostly or only with one parent.
Bergström and colleagues, 2018: read the evidence recordDoes 50/50 only work when both homes are almost the same?
The argument
A strong objection is that shared care only appears successful because those parents are amicable, organised, live close together, maintain the same rules and routines, and make friends and activities available from both homes. Without those conditions, children may feel divided between two different lives or feel they must be a different person in each home.
What the research actually supports
This objection identifies real pressures, but it goes too far when it says they explain everything or that both homes must be identical. Children report that distance, exchanges, conflict, inflexibility, belongings, friendships, activities, rules, routines, loyalty, and belonging can matter. Some children find differences between homes difficult, while others adapt well and value substantial time with both parents. A report that a child acts differently in each home should be explored, but it is not by itself proof of harm. Children also behave differently across school, friends, relatives, and home. The important evidence is whether the child feels unsafe, silenced, pressured, disloyal, unable to be themselves, or burdened by incompatible expectations. The evidence supports examining how the arrangement works for this child. It does not support assuming that different households automatically cause harm or that reducing one parent to limited contact removes the underlying conflict.
Children's experiences support part of the concern
A 2022 systematic review included 17 qualitative studies. Some children found different rules and routines, exchange days, distance, friendships, activities, and belonging difficult. Most were nevertheless satisfied with shared care because they valued substantial contact with both parents.
Johansen and colleagues, 2022: read the paper summaryIdentical homes were not shown to be necessary
In interviews with 46 parents of 50 young children, some families coordinated basic sleep and food routines. Other parents accepted different rules and expected children to adapt. Most believed their children adjusted well. Continuing conflict was the clearest exception.
Bergström and colleagues, 2019: read the paper summaryHigh conflict can remove the average shared-care advantage
In 1,087 German post-separation families, shared care was associated with better mental health overall. When parental conflict was high, children in shared and mainly-one-parent care had similar mental-health problems.
Augustijn, 2021: read the paper summaryPersistent conflict deserves more weight than a temporary dispute
A review of 11 studies found that more parenting time was linked with poorer adjustment in some samples where high conflict continued for years. Studies closer to separation were mixed, and several found no conflict-by-time effect. Parenting quality was protective.
Mahrer and colleagues, 2018: read the paper summaryEvidence to ask for in an individual case
- What difficulty is the child actually experiencing, and who observed it?
- Is the problem the percentage of time, or conflict, distance, rigid exchanges, missing belongings, disrupted activities, or being used as a messenger?
- Which routines need consistency for health, school, sleep, medication, or development, and which differences are ordinary household variation?
- Can the schedule, exchange place, communication method, duplicate belongings, or transport plan be changed without weakening a safe parent-child relationship?
- What does the child say, taking account of age, maturity, pressure, loyalty conflict, and whether the child feels free to speak?
The strongest objection and the evidence in response
Shared-care families often have more money, less conflict, more involved parents, and better cooperation before the study begins. Their outcomes do not prove that changing the schedule will help another child.
That is the central limitation and should remain with the evidence. The studies do not promise that shared care creates better outcomes in every family. They do make a broad claim of general harm difficult to sustain because the recurring average pattern is neutral or positive across countries, ages, and outcomes.
Open these papers next
Each link opens a plain-language record with the report summary, researchers’ conclusions, limitations, full citation, and original publication link.
Custody and living arrangements after parents separate: Implications for children and adolescents
Start with children's reported experiences of rules, routines, distance, exchanges, flexibility, belonging, friends, and activities.
Trine B. Johansen, Hege Nøkleby, Lars J. Langøien & Tiril C. Borge (2022)We also communicate through a book in the diaper bag: Separated parents' ways to coparent and promote adaptation of their 1 to 4 year olds in equal joint physical custody
Read how families with young children actually handled different homes, communication, routines, and schedule changes.
Malin Bergström, Anna Sarkadi, Anders Hjern & Emma Fransson (2019)Does shared parenting help or hurt children in high-conflict divorced families?
Read the mixed evidence showing why persistent conflict, parenting quality, and time since separation must be considered together.
Nicole E. Mahrer, Karey L. O'Hara, Irwin N. Sandler & Sharlene A. Wolchik (2018)The relation between joint physical custody, interparental conflict, and children's mental health
See a 1,087-family comparison in which high conflict removed the average mental-health advantage associated with shared care.
Lara Augustijn (2021)Child adjustment in joint physical custody versus sole custody: A meta-analytic review
Start with the pooled result and its small average difference.
Amandine Baude, Jessica Pearson & Sylvie Drapeau (2016)Joint versus sole physical custody: Children’s outcomes independent of parent–child relationships, income, and conflict in 60 studies
See the clearest breakdown of positive, equal, and mixed findings across 60 studies.
Linda Nielsen (2018)Re-examining the research on parental conflict, coparenting, and custody arrangements
See what 17 conflict-adjusted studies reported and where ordinary conflict ends and safety concerns begin.
Linda Nielsen (2017)Children’s and parents’ well-being in joint physical custody: A literature review
Read a cautious international review that gives family selection and differing definitions proper weight.
Anja Steinbach (2019)Fifty moves a year: Is there an association between joint physical custody and psychosomatic problems in children?
Open the very large study that directly tested stress-related physical and emotional symptoms.
Malin Bergström, Emma Fransson, Bitte Modin, Marie Berlin, Per A. Gustafsson & Anders Hjern (2015)