adolescence adolescent adolescenten adolescentpsychology adolescents aufsatzsammlung bergenprosjektet child childpsychiatry childrenofteenagemothers dyslexia dyslexicchildren dyslexie enfantsdemeresadolescentes enfantsdemèresadolescentes enfantsdyslexiques family family/marriage infant interpersonalrelations la˜ngsschnittuntersuchung lernbehinderung lifestages longitudinalstudies marriage meresadolescentes moeders motherhood mèresadolescentes parentandchild parenthood parenting pregnancy psychiatry psychology relationships sociology sociologyofyouth teenagemothers unitedstates étudeslongitudinales