Teen and chatting with adult
Peers also influence teenagers more than they influence younger children.
Increased social demands — in the form of online chat, social networking and web browsing — combine with greater academic pressures as children enter high school.
A recent review identified increased risk for suicide, being overweight, high rates of injury, poor sustained attention and low school grades for teens sleeping less than eight hours.
Sleeping nine or more hours has, on the other hand, been associated with better life satisfaction, fewer health complaints and better quality family relationships for teens.
Shifts in balance between brain systems create a period where teens may take increased risks or engage in more reward seeking.
Teenagers react a lot to stress and their stress-response systems are maturing.
Of course, they still have to rise early for school.
University of British Columbia provides funding as a member of The Conversation CA-FR.