Researchers from the University of Warwick, in association with colleagues at the University of Bristol, followed a group of UK children from birth to fully understand the extent of bullying on psychosis in later life.
The researchers discovered some groups were almost five times more likely to suffer from mental health episodes at the age of 18.
The study, published in Psychological Medicine, shows that victims, perpetrators and those who are both bullies and victims (bully-victims), are at an increased risk of developing psychotic experiences.
In order to determine the true effects of bullying, researchers statistically controlled for external factors such as family factors or pre-existing behavior problems.
Results indicate that not only the children who were bullied over a number of years (chronic victims), but also the bullies themselves in primary school, were up to four and a half times more likely to have suffered from psychotic experiences by the age of 18.
Even children only exposed to brief periods of bullying (e.g. at 8 or 10 years of age) were at increased risk for psychotic experiences.
The term “psychotic experiences” covers a range of experiences, from hearing voices and seeing things that are not there to paranoia. These experiences, if persistent, are highly distressing and disruptive to everyday life.
They are diagnosed by GPs or psychiatrists as “psychotic disorders” such as schizophrenia. Exact diagnosis is difficult and requires careful assessment as in this study.
“We want to eradicate the myth that bullying at a young age could be viewed as a harmless rite of passage that everyone goes through,” said Dieter Wolke, Ph.D., of the University of Warwick. ”It casts a long shadow over a person’s life and can have serious consequences for mental health.”
“These numbers show exactly how much childhood bullying can impact on psychosis in adult life. It strengthens on the evidence base that reducing bullying in childhood could substantially reduce mental health problems. The benefit to society would be huge, but of course, the greatest benefit would be to the individual.”
Wolke’s team have previously looked at the impact of bullying on psychotic symptoms in 12-year-olds, and there have been a range of short-term studies that confirm the relation between being a victim of bullying and psychotic symptoms.
This study, however, is the first to report the long term impact of being involved in bullying during childhood — whether victim, bully or bully-victim — on psychotic experiences in late adolescence or adulthood.
Wolke added, “The results show that interventions against bullying should start early, in primary school, to prevent long-term serious effects on children’s mental health. This clearly isn’t something that can wait until secondary school to be resolved; the damage may already have been done.”
Source: University of Warwick