With access to so many friends online, the abuser can post a damaging message online about their significant other or make threats to do so.
"It's the phenomenon of no place to run and no place to hide," Jennings says. You can't even see your predator coming." Jill Murray, a psychotherapist in California who has worked with victims of teen dating abuse, says almost all her new cases in the past three years involve technology.
In some instances, the victims, usually teenage girls, receive as many as 40 texts a day with negative messages from their partner.
"She is required to keep her cell phone on all day, all night and be receptive," Murray explains.
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(CNN) -- There were no scars, no bruises to indicate the abuse Allyson Pereira, a 16-year-old high school sophomore in New Jersey, had suffered. She said he gave her an offer: Text him a naked picture of herself, and he would get back together with her. Pereira, who was featured in the MTV anti-digital dating abuse campaign, "A Thin Line," in December, has been speaking out against the growing problem of digital dating abuse among teens.
Her emotional pain was caused by her high school boyfriend, who blitzed her with cruel comments via instant messages, e-mails and My Space, calling her ugly and accusing her of cheating. Pereira, now 21, regrets sending her boyfriend the topless picture that was subsequently forwarded to other students in her high school. In the MTV documentary, Pereira's parents and friends also warned about the consequences of sexting photos like the one that caused Pereira such pain.
The Family Violence Prevention Fund is working with the Department of Justice to release a series of public service announcements in their "That's Not Cool" campaign, which encourages teens to be more watchful of their digital relationship behavior.
Liz Claiborne Inc., a major women's clothing company, is addressing digital dating abuse.
The study examined 4,400 responses from 11- to 18-year-old students in one school district in the southern U. The study's authors say this is one of the first attempts to quantify how often digital dating abuse is occurring among teens.
"It may be checking her text and pictures to make sure she's not texting with any other boys," explains Sameer Hinduja, co-founder of the Cyberbullying Research Center and associate professor of criminology at Florida Atlantic University.
The abusive teens may also monitor their partners' behaviors on social media sites such as Facebook and My Space.