1, 18-19, A, ADOLESCENT, APPLICATION, AT, BEDROOM, CELLPHONE, CELLULAR, FACEBOOK, GIRL, HIGHT, INDOOR, INSIDE, INTERNET, IPHONE, MOBILE, NETWORK, NIGHT, ONE, PERSON, PHANIE, PHONE, PROFILE, RECEIVE, RECEIVING, SCHOOL, SENDING, SITTING, SLEEP, SMART, SMARTPHONE, SMS, SOCIAL, STUDENT, TEEN, TEENAGE, TELEPHONE, TWITTER, USING, VOISIN, YEARS, YOUNG,