RT Article T1 Attention problems versus conduct problems as six-year predictors of problem scores in a national sample JF Journal of the American Academy of Child and Adolescent Psychiatry VO 35 IS 9 SP 1237 OP 1246 A1 MacDonald, V. M. A2 Achenbach, Thomas M. LA English YR 1996 UL https://krimdok.uni-tuebingen.de/Record/1639206051 K1 Hyperaktivität K1 Verlaufsstudie