I have on several occasions been in groups where I knew the purpose was to examine how leadership would emerge. I knew we would talk about group dynamics and all that afterward. If I led out, I would be congratulated a little bit, but then also slammed for taking over, being bossy. So when I see the trap coming, I try to play dumb. I want other people to lead. I give off little helpful noises. And then when time is running out and the group has made no progress, I tell the others how to solve the problem we were given. It's all very stressful, especially for an introvert like me.
Which is why I disliked group projects in school.