MONDAY, July 22, 2019 (HealthDay News) -- It's a vicious cycle: Teens who are belittled and demeaned by their parents are more likely to be bullied and to bully others, a new study suggests. "Inappropriate interpersonal responses appear to spread from parents to children, where they spawn peer difficulties," said study co-author Brett Laursen, a professor of psychology at Florida Atlantic University. "Specifically, derisive parenting precipitates a cycle of negative affect and anger between parents and adolescents, which ultimately leads to greater adolescent bullying and victimization," he explained in a university news release. "Our study is important because it provides a more complete understanding of how parents' belittling and critical interactions with adolescents thwart...