Where a child is not attending, the adults are often already cross with each other. That argument has to be parked before any plan will hold.

What the research says

In a worksite trial with 107 distressed employees, acceptance and commitment therapy and stress inoculation training both reduced distress, although they start from quite different premises. It is one trial in one setting and says nothing about who was right about anything. It does suggest that arguing over whose method is correct can matter less than settling on something and doing it consistently.

Strength of evidence: one line of research. A single study, or a theoretical account.