This in an intervention I use with my clients to help them open up (a lot of them are anxious and won't talk), particularly in groups to facilitate discussion. Because about 99% of my clients have some type of anxiety disorder, we normally use CBT to treat it, and this intervention allows them to feel comfortable opening up and talking about their feelings. It also helps gather information about the client that they may not have normally told you (without the game).
Masia-Warner C, Klein RG, Dent HC, et al. (2005). School-based intervention for adolescents with social anxiety disorder: results of a controlled study. J Abnorm Child Psychology, 33(6):707-722.
Verhulst F. (2001) Community and epidemiological aspects of anxiety disorders in children. In: Silverman WK, Treffers PDA, eds. Anxiety Disorders in Children and Adolescents: Research, Assessment and Intervention. Cambridge, MA: Cambridge University Press; 273-292.