Chili (3) Teenagers (3) Students (3) Schools (3) Research (3) Factores (3) Chilenos (3) Estudiantes (3) Centros docentes (3) Investigación (3) Adolescentes (3) Colombie (2) School children (2) Sampling (2) Psychology (2) Indexes (2) Error (2) Colombians (2) Climatology (2) Toma de muestras (2) Colombianos (2) Error (2) Índices (2) Escolares (2) Clima (2) Psicología (2) climat (2) Certification (1) Social values (1) Population (1)