Mediator or moderator? The role of mindfulness in the association between child behavior problems and parental stress

Parents of children with intellectual disability (ID) tend to report high psychological stress. Previous self-report studies have identified mindfulness as a mediator in the association between child behavior problems and parental stress. The present study differs from previous studies by including third-party's reports. It has contributed to the existing body of knowledge in two respects. First, it examined whether the mediation effect resulted from parent self-report bias. Second, it tested an alternative hypothesis of the moderation effect by using teachers' reports to measure child behavior problems. The results showed that when child behavior problems were measured by parents' reports, parental mindfulness was a mediator between child behavior problems and parental stress. The more the parents reported that their children had behavior problems, the less they reported being mindful, which in turn the more stressful they were. However, when child behavior problems were measured by teachers' reports, parental mindfulness was a moderator instead, moderating the association between child behavior problems and parental stress. The association was ameliorated when parents reported high levels of mindfulness. These findings reveal another possible role of mindfulness and shed light on the support for parents of children with ID.