How to use it
Charisma is trainable. In anything you say to a group, use at least three of: a metaphor, a story, a contrast ("not X, but Y"), a list of three, a moral line, and a high standard with confidence they can meet it. Animated voice, hands visible.
How sure we are
P Evidence: promising. Good studies, but small or few. Use it and keep checking.
Sources
Antonakis et al. (two studies, one field experiment).
Not medical, legal or financial advice.