Co-parenting conflict (Feinberg)
Coparenting is how two adults work together as parents, apart from how they get on as a couple. Feinberg describes four parts: agreement on childrearing, support or undermining of each other as parents, the division of childcare work, and how the family’s conflicts and alliances are managed. Co-parenting conflict is open fighting or steady undermining in that partnership, whether the parents live together or apart.
What drives it
Children feel the parenting partnership directly: the contradiction at bedtime, the sigh when the other parent’s rules come up, being asked what happened at the other house. For identification the frame separates a couple problem from a parenting-partnership problem, since a couple can be close and still undercut each other as parents, or separated and still a good team.
How it shows
Work
A parent fields texts about pickup and schedules through the workday, and one message from the other parent can wreck an afternoon’s focus.
Relationships
‘Your dad lets you’, said in front of the child. One parent says no screens and the other hands over the tablet. After a separation: handovers in a parking lot with no words, a child carrying messages, a fight over every holiday on the calendar.
Self
Notice what you say about the other parent when your child can hear, and what your face does when their name comes up.
What tells it apart
Triangulation: Triangulation pulls a third person into tension between two. Co-parenting conflict may turn into triangulation when a child is used as messenger, confidant or ally.
Money conflict in couples: Money conflict in couples is about spending, saving and fairness with money. Co-parenting conflict is about raising the children, though the two may run together, especially around child support.
Parental alienation (a contested concept): When a child starts refusing one parent after a separation, high co-parenting conflict, the child’s own reactions to a parent’s behavior and alienating behavior by the other parent may all be in play, and from the outside they are hard to tell apart.
A test
Ask each parent separately how decisions about the children get made, and when the other parent last backed them up in front of the child. Different answers, few recent examples, or a child who carries messages may point to co-parenting conflict, even in a couple that otherwise gets on well.
Questions to carry
- The last time we disagreed about the kids, where was my child and what did they see?
- What am I afraid will happen if I let the other parent’s way stand?
Go deeper
- Read: The Kazdin Method for Parenting the Defiant Child, Alan E. Kazdin with Carlo Rotella, 2008. Written for parents by a Yale psychologist who spent decades testing parent management training: praise and small rewards for the behavior a parent wants to see, built up in small steps. That approach has many controlled trials behind it with children referred for defiance and aggression, though Kazdin's own 1997 review said questions remained about how large, wide and lasting the effects are. The book itself does not walk through the studies. It carries the Association for Behavioral and Cognitive Therapies' Self-Help Seal of Merit.
How strong the research is
moderate. A 2022 meta-analysis of 93 studies with 41,207 participants (Zhao and colleagues) found that better coparenting went with fewer behavior problems and less anxiety and low mood in children, a small effect (r of about .16 to .17), and that conflict was the most consistent predictor. In a follow-up of the Family Foundations trial, a class for couples expecting a first child, teachers rated program children as having fewer internalizing problems 5 to 7 years later, and boys had fewer externalizing problems, though the authors noted that many families dropped out (Feinberg and colleagues, Journal of Family Psychology, 2014). Outside trials like this one, the evidence is correlational.
Where it comes from
Mark Feinberg, ‘The internal structure and ecological context of coparenting: A framework for research and intervention’, Parenting: Science and Practice, 2003. Family Foundations, Feinberg and colleagues