CHICAGO - About four in every 10 US youngsters age 10 to 17 report they've seen pornography while on the internet, two-thirds of them saying it was uninvited, according to a study published on Monday.
Many of the encounters with online pornography, both sought-out and accidental, were relatedto use of file-sharing programs to download images, the report from the University of New Hampshire in Durham said.
"Although there is evidence that most youth are not particularly upset when they encounter unwanted pornography on the internet (it) could have a greater impact on some youth than voluntary encounters with pornography," the study said.
"Some youth may be psychologically and developmentally unprepared for unwanted exposure, and online images may be more graphic and extreme than pornography available from other sources," it added.
The report, published in the February issue of Pediatrics, the journal of the American Academy of Pediatrics, was based on a telephone survey made of a representative sample of 1,500 US youngsters from March to June, 2005.
In all 42 per cent reported having been exposed to online pornography in the 12 months before they were questioned. Of that group 66 per cent said they were not trying to find the material when they encountered it, which happened sometimes because of misspelled Web addresses, pop-up advertisements or spam emails.
The remaining third who said they sought out pornography were more likely to be teen-aged boys who also used file-sharing programs to download images, talked online to strangers about sex, used the internet at friends' homes, or possibly suffered from depression.
The researchers said sexual curiosity is normal in the teen years "and many might say that visiting X-rated websites is developmentally appropriate behaviour." But they said some experts are worried that it could undermine social values or attitudes about sexual behaviour, lead to promiscuity or compulsive and deviant behaviour.
Doctors, teachers, parents and others "should assume that most boys of high school age who use the internet have some degree of exposure to online pornography as do many girls," the study concluded.
