In a study of over 7,500 children, researchers at the University of Cambridge and University College Dublin found that children exposed to ‘hostile’ parenting at age three were 1.5 times likelier than their peers to have mental health symptoms which qualified as ‘high risk’ by age nine.
Hostile parenting involves frequent harsh treatment and discipline and can be physical or psychological. It may, for example, involve shouting at children regularly, routine physical punishment, isolating children when they misbehave, damaging their self-esteem, or punishing children unpredictably depending on the parent’s mood.
The researchers charted children’s mental health symptoms at ages three, five and nine. They studied both internalising mental health symptoms (such as anxiety and social withdrawal) and externalising symptoms (such as impulsive and aggressive behaviour, and hyperactivity).
About 10 per cent of the children were found to be in a high-risk band for poor mental health. Children who experienced hostile parenting were much more likely to fall into this group.
The researchers found that, based on the trajectories along which their mental health symptoms developed between ages three and nine, the children fell into three broad categories. Most (83.5 per cent) were low risk, with low internalising and externalising symptom scores at age three which then fell or remained stable. A few (6.43 per cent) were a mild risk, with high initial scores that decreased over time, but remained higher than the first group. The remaining 10.07 per cent were high risk, with high initial scores that increased by age nine. Hostile parenting raised a child’s chances of being in the high-risk category by 1.5 times, and the mild-risk category by 1.6 times, by age nine. Consistent parenting was found to have a limited protective role, but only against children falling into the ‘mild-risk’ category. To the researchers’ surprise, however, warm parenting did not increase the likelihood of children being in the low-risk group, possibly due to the influence of other factors on mental health outcomes.
Previous research has highlighted the importance of these other factors, many of which the new study also confirmed. Girls, for example, were more likely to be in the high-risk category than boys; children with single parents were 1.4 times more likely to be high-risk, and those from wealthier backgrounds were less likely to exhibit worrying mental health symptoms by middle childhood.
The study was undertaken by Ioannis Katsantonis, a doctoral researcher at the Faculty of Education, University of Cambridge, and Jennifer Symonds, Associate Professor in the UCD School of Education. It is reported in the journal, Epidemiology and Psychiatric Sciences.