Adolescents who snore frequently are more likely to show behavioral issues such as inattention, rule-breaking, and aggression, but their cognitive abilities, including memory and language skills, remain unaffected, a new study reveals. Researchers analyzed data from nearly 12,000 children in the Adolescent Brain Cognitive Development study, the largest U.S. brain development project. They found snoring rates naturally declined as children aged, even without treatment, but persistent snorers showed behavioral difficulties that might be mistaken for ADHD.