KIDS
October 17, 2017

Bullying and Mental Health

Bullying's effects on kids' mental health are both better and worse than we expect.

Bullying is more common than most parents want to admit. According to the Centers for Disease Control and Prevention (CDC), twenty percent of school-aged children have been victims of bullies — and carry the emotional scars it leaves for years.

When someone uses force, threats or coercion to abuse, intimidate or aggressively dominate others, that's bullying. These behaviors are not just one-time offenses. They tend to be repeated and habitual, which is why they can be so damaging. One essential prerequisite, which distinguishes bullying from more normal conflicts between or among peers, is the perception, by the bully or by others, of an imbalance of social or physical power.

Kids who are bullied have been found to have poorer mental health including substance use, depression, low self-esteem and suicide. Victims often show immediate and long-term anxiety, depression and behavior problems.

Which Comes First: Bullying or Mental Health Problems?

The relationship between bullying and mental health is not clear. Is it bullying that directly causes emotional and mental health problems? Or are people who are bullied more vulnerable to mental health issues because of their genetic makeup, their social awkwardness or their environment? A recent study of twins helps clarify some of these issues.

Over 5500 pairs of twins — more than 11,000 preteens and teens — took part in the five-year study. The mean age of the children was 11 at the start of the study and 16 at the end. Since the twins shared genetic makeup and environmental exposures, the design of the study used one twin as a control for the other, accounting for potential mitigating factors such as shared environmental and genetic influences.

One essential prerequisite, which distinguishes bullying from more normal conflicts between or among peers, is the perception, by the bully or by others, of an imbalance of social or physical power.

The researchers measured twins' exposure to bullying using a standardized questionnaire given when they were 11 and 14. The kids answered questions about the different types of bullying, if any, they had experienced — from verbal and physical intimidation, to social manipulation. Their mental health was also evaluated, using questionnaires, at ages 11 and 16.

The twin study format provides strong evidence that bullying directly impacts the mental health of its victims, according to the authors. Being bullied caused or contributed to a number of mental health issues. Bullied kids' anxiety persisted for two years after the bullying events, though it decreased five years after the bullying ceased. Paranoid thoughts about further persecution and cognitive disorganization, such as attention problems, affected the children for the five years of the study.

More positively, some of the mental health and behavioral effects of bullying decreased over time, as children matured, the study found. The fact that these negative mental health effects of bullying diminished over time, the authors believe, is a reflection of the resilience of the victims.

Things Do Get Better

Since children did recover from their negative experiences to some degree, the findings serve as a hopeful message to the victims of bullying and their parents. The results suggest that some of the association between bullying and mental problems among this population is not causal, but related to temperament. This is important because if interpreted causally, population studies of bullying will exaggerate the true effect of bullying and overestimate the gain from interventions.

The findings serve as a hopeful message to victims and their parents because it shows that their children can recover from their negative experiences.

The authors conclude that, “There are both causal and non-causal processes underlying mental health outcomes in children who have been bullied that have direct clinical implications for reducing the effect of being bullied by a peer.” They see the need for two approaches — one geared to reducing bullying itself and the other addressing the vulnerabilities that raise a child's susceptibility to being bullied.

“[S]ome children are more vulnerable and require greater support to reach their full potential,” the authors write. These vulnerabilities may be physical, emotional or behavioral traits that serve as targets for bullies. Small or physically timid children, children who are shy or have less developed social skills can be identified as being in need of primary prevention and intervention strategies before they are abused.

The open access study is published in JAMA Psychiatry

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