Daniel J. Steinbock Craig Kaplan Marko A. Rodriguez Juana Diaz Newton Der Suzanne Garcia Collective Intelligence Quanitifed for Computer-Mediated Group Problem Solving http://arxiv.org/abs/cs/0412064 2004 CoRR abs/cs/0412064 db/journals/corr/corr0412.html#abs-cs-0412064 informal publication