Adolescence is a transitional stage from childhood to adulthood during which the individual undergoes many physiological, psychological, cognitive, and social changes. Adolescence is also a risk period for the emergence of many psychological and social adjustment problems. Internalizing symptoms, including somatic, depression-, anxiety- and stress-related symptoms, begin to rise, especially among girls. Boys exhibit higher prevalence rates of externalizing symptoms, including hyperactive, disruptive, rule-breaking and aggressive behaviors, than do girls, but this gender gap narrows in adolescence. Attention Hyperactivity Disorder (ADHD) is more prevalent in boys than in girls. However, girls are more often diagnosed with a predominantly inattentive subtype, and boys with a predominantly hyperactive and impulsive subtype. These core symptoms often diminish when individuals transfer from childhood to adolescence and early adulthood, but hyperactivity and impulsivity symptoms decrease faster than do attention problems. Read more..