The present work is part of a larger research project on the ecological risks of development in urban settings and the impact of socialisation contexts ( both formal and informal) on the styles of social and emotional relationships with parents and peers in pre-adolescents (11-14 years). The part of the project hereby presented is based on a study of daily time occupation of nearly 300 pre-adolescents in Lisbon,, their conditions of life. and patterns of daily social interactions.