I am aware of the effect of positive emotions on others, but I am wondering about negative emotions.  I am not talking about [insults leading to negative emotions][1].  I am talking about emotions like anger, frustration etc. in some leading to anger, frustration etc. in others.

Are there any studies which suggest that there is the ability for emotions such as anger and frustration to transfer and spread amongst others or lead to **other** emotions in others?

For example, can a group of people seeing one or more people getting frustrated about something lead to some or all in the observing group suffer from frustration or annoyance or other negative emotions?


  [1]: http://cogsci.stackexchange.com/questions/4126/how-to-prevent-insults-from-unconsciously-causing-negative-emotions