CHI PLAY 2014 - Proceedings of the 2014 Annual Symposium on Computer-Human Interaction in Play - Kappen, D.L.; Mirza-Babaei, P.; Johannsmeier, J.; Buckstein, D.; Robb, J.; Nacke, L.E. (Engaged by boos and cheers: The effect of co-located game audiences on social player experience, 2014)