Test of the language-aggression hypothesis.
D000124:Achievement; D001741:Black or African American; D000374:Aggression; D002648:Child; D006801:Humans; D008297:Male; D011647:Puerto Rico / Q000208:ethnology; D014481:United States; D014505:Urban Population; D014705:Verbal Behavior; D014888:Wechsler Scales