THURSDAY, Aug. 21 (HealthDay News) -- One reason why abstinence-only programs don't do much to prevent teen sexual activity is because abstinence can mean different things to teens than it does to adults, according to a University of Washington study.

Teens' attitudes and intentions about sex are more powerful than their attitudes and intentions about being abstinent, the researchers found.

THURSDAY, May 8 (HealthDay News) -- The use of a computer-assisted training program, in addition to traditional counseling, helped drug abusers stay abstinent longer than counseling alone, a Yale University School of Medicine study found.