Teenagers (2) Anxiety (2) établissement scolaire (1) recherche (1) âge (1) internet (1) Internet users (1) Internet addiction (1) Social phobia (1) Internet (1) Youth (1) Young adults (1) Trust (1) Toleration (1) Symptoms (1) Revelation (1) Research (1) Population (1) Parent and child (1) Optimism (1) Manufacturers' agents (1) Males (1) Families (1) Emotions (1) Education, Secondary (1) Confidence (1) Commission merchants (1) College students (1) Attention (1) Older people (1)