Media coverage of terror attacks and extremism can leave young people anxious and with an exaggerated fear of becoming victims, say researchers.
A study of the attitudes of 11 to 16-year-olds found that terrorism was seen as a bigger worry than issues such as bullying, racism, cruelty to children or worries about getting a job.
More than two-thirds expressed fears about the threat of terrorism.
The report suggests that children can have a "skewed" view of levels of risk.
The report, from marketing research firm Childwise, which studies media use among children and young people, found high levels of anxiety about the threat of violence from terror, extremism or warfare.