Discovery and exploration (1) Memetics (1) Contagion (Social psychology) (1) Teenagers (1) People with social disabilities (1) Slums (1) Risk (1) High schools (1) Friendship (1) Dropouts (1) Dating (Social customs) (1) Brothers and sisters (1) Teenage girls (1) Infancy (1) Friends and associates (1) Relaciones amorosas (1) Abandono de los estudios (1) Descubrimientos geográficos (1) Amistad (1) Marginados sociales (1) Mujeres adolescentes (1) École (1) Réseau (1) Imitation sociale (1) Publics (1) Amoureux (1) Jeunes (1) Relations amoureuses (1) Amis et relations (1) Pairie (1)