Example:
If you ask a child if they want a cookie, most likely they will look at their parent to get approval. They are nonverbally cueing you that the parent is the leader.
Sleuth Tip:
If you ever want to know who the leader is, see who people in a group look at when an important question is asked, or who they look at when a joke is told. We nonverbally indicate this by looking towards the person we believe is the leader.
This quote sums up the eye contact made during the debate: