Aggression

Aggression

1. Group displays- Sport

   • Evan and Rave 2002- Xenophobia. 40 football matches, more aggressive behaviour when playing national opponents.
   • Lewis et al 2005- Protecting territory. Crowd support was most important factor for home advantage.

2. Group displays- Warfare

   • Palmer and Tilly 1995- Increased attractiveness. Male youth street gang members have more sexual partners than other young males.
   • Sosis et al 2005- Solidarity. In external wars males are grouped as large combat groups where permanent group displays take place.