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Showing posts with label effects of witnessed violence. Show all posts
Showing posts with label effects of witnessed violence. Show all posts

Thursday, 3 July 2014

Potential Harmful Effects of Violence in the Media

Early research on the effects of viewing violence on television — especially among children — found a desensitizing effect and the potential for aggression. Is the same true for those who play violent video games? Psychological researchers are studying the question.

Television and Video Violence

Virtually since the dawn of television, parents, teachers, legislators and mental health professionals have wanted to understand the impact of television programs, particularly on children. Of special concern has been the portrayal of violence, particularly given psychologist Albert Bandura's work in the 1970s on social learning and the tendency of children to imitate what they see. As a result of 15 years of “consistently disturbing” findings about the violent content of children's programs, the Surgeon General's Scientific Advisory Committee on Television and Social Behavior was formed in 1969 to assess the impact of violence on the attitudes, values and behavior of viewers. The resulting report and a follow-up report in 1982 by the National Institute of Mental Health identified these major effects of seeing violence on television:
  • Children may become less sensitive to the pain and suffering of others.
  • Children may be more fearful of the world around them.
  • Children may be more likely to behave in aggressive or harmful ways toward others.
Research by psychologists L. Rowell Huesmann, Leonard Eron and others starting in the 1980s found that children who watched many hours of violence on television when they were in elementary school tended to show higher levels of aggressive behavior when they became teenagers. By observing these participants into adulthood, Huesmann and Eron found that the ones who'd watched a lot of TV violence when they were 8 years old were more likely to be arrested and prosecuted for criminal acts as adults. Interestingly, being aggressive as a child did not predict watching more violent TV as a teenager, suggesting that TV watching could be a cause rather than a consequence of aggressive behavior. However, later research by psychologists Douglas Gentile and Brad Bushman, among others, suggested that exposure to media violence is just one of several factors that can contribute to aggressive behavior.

Other research has found that exposure to media violence can desensitize people to violence in the real world and that, for some people, watching violence in the media becomes enjoyable and does not result in the anxious arousal that would be expected from seeing such imagery.
Video Game Violence

The advent of video games raised new questions about the potential impact of media violence, since the video game player is an active participant rather than merely a viewer. Ninety-seven percent of adolescents age 12-17 play video games — on a computer, on consoles such as the Wii, Playstation and Xbox, or on portable devices such as Gameboys, smartphones and tablets. A Pew Research Center survey in 2008 found that half of all teens reported playing a video game “yesterday,” and those who played every day typically did so for an hour or more.

Many of the most popular video games, such as “Call of Duty” and “Grand Theft Auto,” are violent; however, as video game technology is relatively new, there are fewer empirical studies of video game violence than other forms of media violence. Still, several meta-analytic reviews have reported negative effects of exposure to violence in video games. A 2010 review by psychologist Craig A. Anderson and others concluded that “the evidence strongly suggests that exposure to violent video games is a causal risk factor for increased aggressive behavior, aggressive cognition, and aggressive affect and for decreased empathy and prosocial behavior.” Anderson’s earlier research showed that playing violent video games can increase a person's aggressive thoughts, feelings and behavior both in laboratory settings and in daily life. "One major conclusion from this and other research on violent entertainment media is that content matters," says Anderson.

Other researchers, including psychologist Christopher J. Ferguson, have challenged the position that video game violence harms children. While his own 2009 meta–analytic review reported results similar to Anderson’s, Ferguson contends that laboratory results have not translated into real world, meaningful effects. He also claims that much of the research into video game violence has failed to control for other variables such as mental health and family life, which may have impacted the results. His work has found that children who are already at risk may be more likely to choose to play violent video games. According to Ferguson, these other risk factors, as opposed to the games, cause aggressive and violent behavior.

The American Psychological Association launched an analysis in 2013 of peer-reviewed research on the impact of media violence and is reviewing its policy statements in the area. Both are expected to be completed in 2014.

Thursday, 30 August 2012

Exposure to Violence Has Long-Term Stress Effects Among Adolescents

Children who are exposed to community violence continue to exhibit a physical stress response up to a year after the exposure, suggesting that exposure to violence may have long-term negative health consequences, according researchers at Penn State and University College London.

"We know that exposure to violence is linked with aggression, depression, post-traumatic stress symptoms and academic and cognitive difficulties in the short term, but little is known about the long-term effects of such exposure," said Elizabeth Susman, Jean Phillips Shibley Professor of Biobehavioral Health, Penn State. "Our data show that the stress reaction to violence exposure is not just immediate. There's an effect that endures."

The scientists recruited 124 adolescents, ranging in age from 8 to 13 and living in small city and rural communities, to participate in the study.

"Most studies of the effects of exposure to violence look at children who live in inner cities and urban communities," said Melissa Peckins, biobehavioral health graduate student, Penn State. "Our study is unique because we focused on children who live in small towns, so they are not children you would normally expect to be exposed to a lot of violence. Also, these were healthy children without a history of reported maltreatment."

The researchers gave each of the adolescents a questionnaire, which identified their lifetime exposure to violence and exposure within the past 12 months. They then gave the adolescents the beginning of a story and asked them to complete it in front of two mock judges, whom they were told were evaluating their responses and performances for later comparison to those of other children the same age. Following the story-completion task, adolescents were also given a serial subtraction task.

"The story completion task and mental arithmetic task are commonly used to elicit a stress response in laboratory settings," Peckins said. "Our hypothesis was that children who have been exposed to more violent events in the past year will have an attenuated response to the laboratory stressor -- even 12 months after the incidence -- compared with children who experienced fewer violent events."

The team measured the children's stress responses by comparing the cortisol levels present in samples of their saliva collected before and after the stress test was administered.

"In males, we found that as exposure to violence increased, cortisol reactivity decreased, so cortisol reactivity was attenuated; it was a habituation effect," Peckins said.

The finding was not present in females. The results were published online in a recent issue of the Journal of Adolescent Health.

"In enduring stressful conditions, we may have adapted evolutionarily to suppress our cortisol levels because higher and more prolonged levels of cortisol in the bloodstream can lead to negative health consequences, such as autoimmune disorders, lowered immunity, arthritis and atypical depression. This may explain why cortisol reactivity was lower for males," Susman said. "However, there is a theory that females may react to stressful situations by talking about it, which may be their way of reducing the negative effects of cortisol in the bloodstream. If parents and other adults are available to discuss episodes of violence with children, it might help the children, especially females, to reduce their cortisol levels."

In the future, the team hopes to examine the role of duration of exposure to violence and time elapsed after exposure to violence on cortisol reactivity.

Other researchers on this project were Samantha Dockray, research fellow, University College London, and Jacey Eckenrode, graduate student in biobehavioral health and Jodi Heaton, administrative assistant, biobehavioral health, both at Penn State.

The National Institute of Mental Health, the General Clinical Research Center of the National Institutes of Health and Penn State supported this work.