Читать книгу Child Psychology - Jean-Pascal Assailly - Страница 25

The first wave of the longitudinal Bergen Child Study (BCS) assessed a wide range of mental health problems in a total population of Norwegian schoolchildren aged seven to nine years (n = 9,430), using teacher and parent questionnaires in all schools, including special and private schools. Teacher questionnaires (n = 9,152) covered 97% of the population, whereas parent questionnaires (n = 6,295) covered 67% of the population.