New research shows that adolescents who were overweight, struggled to make friends, were born outside the U.S., or faced mental health challenges such as anxiety, depression, ADD/ADHD or learning disabilities were at greater risk of involvement in bullying, either as victims, perpetrators or both. The findings reveal a troubling cycle, underscoring the need for prevention efforts that address the social, family, and health-related factors shaping adolescent behavior.

New research from Finland’s Aalto University has clarified how well-being is linked with autonomy, national wealth and the level of individualism in a culture. The researchers found that a sense of autonomy in one’s life is universally important, but the link with happiness is stronger in wealthier and more individualistic countries.