RT Article T1 Natural social behavior in hyperactive children: dose effects of methylphenidate JF Journal of consulting and clinical psychology VO 55 IS 2 SP 187 OP 193 A1 Whalen, Carol K. LA English YR 1987 UL https://krimdok.uni-tuebingen.de/Record/163359372X K1 Hyperaktive Kinder K1 Methylphenidat