IBM's Asshole Test
Here in Brazil HR has a similar setup of group tests that they call "Group Dynamics". They would give a task and let the group figure by itself how to solve it.After some experience with it I figured out that it wasn't the task or who had more "mic time", but who would show leadership skills that mattered.As usually everyone wanted to talk, what I did was just to orchestrate who said what, making no point on the matter, just controlling the turns and asking "what do you think about Anne's point Dave?". Worked like a charm.