Knowing when not to use the Internet: Shyness and adolescents' on-line and off-line interactions with friends. - Fiorenzo Laghi; Barry H. Schneider; Irene Vitoroulis; Robert Coplan; Roberto Baiocco; Yair Amichai-Hamburger; Natasha Hudek; Diana Koszycki; Scott Miller; Martine Flament (Comput. Hum. Behav., 2013)