Cyber bullying is less likely to be noticed by an adult than traditional bullying.
That's one of the findings contained in a new report on bullying, which reveals 17 per cent of second level students have been victims of cyber bullying.
The study by NUI Maynooth says one in ten students admitted carrying it out themselves - and a quarter of victims never tell anyone about what they are going through.
Cyber bullying usually goes on for one to two weeks and effects younger children more than older children.
The research follows the deaths by suicide of three girls in recent months, including 13 year old Erin Gallagher in Ballybofey in October.
Katherine Donnelly is Education Editor with the Irish Independent - She says the study makes interesting observations about who the bullies are likely to be.............