title: A possible confounding variable in different versions of the "aggression machine" when used in research on alcohol.
mesh_terms: D000328:Adult; D000374:Aggression / Q000187:drug effects* / Q000523:psychology; D000435:Alcoholic Intoxication / Q000523:psychology*; D003071:Cognition; D006801:Humans; D008297:Male; D012107:Research Design