Panorama commissioned a survey of more than 800 parents and youngsters to find out how teenagers used the internet and what their parents knew about it.
Nearly one in seven children admit to chatting to strangers online
The GfK NOP phone poll spoke to 411 youngsters aged between 11 and 16 and 451 parents.
The key findings were;
25% of the children questioned had given out personal details such as a name or mobile number on the internet
Only 13% of parents thought their children had done this.
15% of children admitted to chatting to strangers online.
Only 10% of parents thought their children messaged people they didn't know.
The research was carried out between 11 and 30 October 2007 for use on Panorama: One Click from Danger transmitted on Monday 7 January 2008.
More recently a study by the Child Exploitation and Online Protection Centre found that 25% of children and young people surveyed said that they had met up in the offline world with someone with whom they had made initial contact online (based on a partial sample of 6000 respondents).
Panorama: One Click from Capture will be on BBC One at 8.30pm on Monday 26 May 2008.