Anne Marie Piper Eileen O'Brien Meredith Ringel Morris Terry Winograd SIDES: a cooperative tabletop computer game for social skills development. 1-10 2006 conf/cscw/2006 CSCW http://doi.acm.org/10.1145/1180875.1180877 db/conf/cscw/cscw2006.html#PiperOMW06