RT Article T1 Aggression, Self-Understanding, and Social Competence in Swiss Elementary-School Children JF Swiss journal of psychology VO 65 IS 2 SP 81 OP 91 A1 Malti, Tina 1974- LA English YR 2006 UL https://krimdok.uni-tuebingen.de/Record/163926907X K1 Aggression K1 Soziale Kompetenz K1 Grundschule K1 Selbstkonzept