RT Article T1 Use of extreme rating categories in ratings of child behavior JF Child study journal VO 19 IS 1 SP 51 OP 64 A1 Duncan, Pam A2 Kilpatrick, Doreen LA German YR 1989 UL https://krimdok.uni-tuebingen.de/Record/1635457513 K1 Rating-Verfahren K1 Sozialverhalten K1 Kinder