Answer:
According to the name of the article and personal experience i would have to say yes they do.
Explanation:
1. They contribute to violence because some times they will make you Extremely mad and want to hurt someone or some thing
2. It depends on the type of game some violent game will make you want to copy whats in the game or what happens in the game (Example: Your character beats up or shoots someone you'll sometime pretend to do that IRL)
3. They are addicting and some times even controlling they tempt you to do things including violence.
And those are 3 reasons why violence contribute to playing video games!!
Hope this helped!!! :D