The relationships of Internet use, web communication, and sources of social support with adolescent self-injurious thoughts and behaviors (SITBs) in Taiwan were investigated. The study sample of 391 12 to 18-year-olds was selected from nine public high schools. Findings show that girls are more likely to have SITBs, except for suicide gestures. Web communication is a risk factor for SITBs in boys but not in girls. Family support is protective in both genders. Support from friends is protective and support from significant others was a risk factor for suicide plans in girls. Support from virtual social communities can have both positive and negative effects on adolescent SITBs, with different effects by gender.
