Mast, J. F., & McAndrew, F. T. (2011). Violent lyrics in heavy metal music can increase aggression in males. North American Journal Of Psychology, 13(1), 63-64.

Thirty-five male college students added as much hot sauce as they wanted to a cup of water they believed another subject would have to drink after listening to heavy metal music with violent lyrics, heavy metal music without violent lyrics, or no music at all. Males who were exposed to the music with violent lyrics added more hot sauce to the water than those in the other groups. An equipment failure prevented a definitive analysis of the role played by testosterone in this effect, but the results clearly indicate that it was the lyrics and not other qualities of the music that was responsible for the aggressive behavior. (PsycINFO Database Record (c) 2012 APA, all rights reserved)