How Antisocial Kids May Learn It From Their Parents

behavior

How Antisocial Kids May Learn It From Their Parents

Less parental warmth and more harshness at home can affect how aggressive children become and whether they lack empathy and a moral compass, according to a new study.

Researchers studied 227 pairs of identical twins. They analyzed small differences in the parenting that each twin experienced to see whether these differences could predict the likelihood of antisocial behaviors emerging.

They discovered that the twin who experienced stricter or harsher treatment and less emotional warmth from parents had a greater chance of showing aggression and a lack of empathy and moral compass—a set of characteristics known as callous-unemotional (CU) traits.

Nurture vs. nature

Parents of the twins completed a 50-item questionnaire about the home environment. They also established their harshness and warmth levels by rating 24 statements such as “I often lose my temper with my child” and “My child knows I love him/her.” The researchers assessed child behavior by asking the mother to report on 35 traits related to aggression and CU traits.

“The study convincingly shows that parenting—and not just genes—contributes to the development of risky callous-unemotional traits,” says Luke Hyde, associate professor of psychology at the University of Michigan. “Because identical twins have the same DNA, we can be more sure that the differences in parenting the twins received affects the development of these traits.”

The work, which appears in the Journal of the American Academy of Child and Adolescent Psychiatry, is the latest in a series of studies from lead author Rebecca Waller, assistant professor of psychology at the University of Pennsylvania, and colleagues using observation to assess a variety of aspects of parenting.

The initial research, which considered a biological parent and child, confirmed that parental warmth plays a significant role in whether CU traits materialize.

“Some of the early work on callous-unemotional traits focused on their biological bases, like genetics and the brain, making the argument that these traits develop regardless of what is happening in a child’s environment, that parenting doesn’t matter,” says Waller. “We felt there must be something we could change in the environment that might prevent a susceptible child from going down the pathway to more severe antisocial behavior.”

Waller and Hyde teamed with S. Alexandra Burt, co-director of the Twin Registry at Michigan State University, on the study, using 6-to-11-year-old participants from a large, ongoing study of twins that Burt directs.

Changing behavior

A potential next step is to turn these findings into useable interventions for families trying to prevent a child from developing such traits or to improve troubling behaviors that have already begun, Waller says.

“From a real-world standpoint, creating interventions that work practically and are actually able to change behaviors in different types of families is complicated,” she says. “But these results show that small differences in how parents care for their children matters. Our focus now is on adapting already-successful parenting programs to include specific interventions focused on callous-unemotional traits as well.”

Though an intervention with parents could succeed, the researchers stress that the work isn’t blaming parents for their child’s CU or aggressive behaviors.

“…treatments that work with parents likely can help, even for the most at-risk children.”

“Our previous work with adopted children also showed that genes do matter, and so there is a back and forth,” Hyde says. “Some children may be more difficult to parent. The most important message is that treatments that work with parents likely can help, even for the most at-risk children.”

The researchers acknowledge some limitations to the study, for example, that it skews heavily toward two-parent families, meaning the findings may not be as generalizable to single-parent homes. It also assesses parenting measures and twin behaviors based solely on parenting reports.

Yet despite these drawbacks, the researchers say the work broadens the understanding of how different forms of antisocial behavior, like aggression and callous-unemotional traits, emerge.

“This provides strong evidence that parenting is also important in the development of callous-unemotional traits,” Hyde says. “The good news is we know that treatments can help parents who may need extra support with children struggling with these dangerous behaviors.”

Funding for this research came from the National Institute of Mental Health and the Eunice Kennedy Shriver National Institute for Child Health and Human Development.

Source: University of Pennsylvania

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