Emotional or Rational Leadership?

Who is more effective, an emotional leader or a rational one? 

Let's do an experiment together: Look at this face! 

Your brain has quickly recognized this expression, has judged it to be "a threat”. An emotion of fear, anger or shame arises and with it a defensive or fleeing behavior. 

Let's go to experiment 2. Now I would like you to try to resolve this multiplication mentally: 

17 x 79