[T]he narcissists' preoccupation with their own brilliance inhibits a 
crucial element of successful group decision-making and performance: 
the free and creative exchange of information and ideas.

[Tthe groups led by the greatest egotists chose the worse candidate 
for the job.  ... "The narcissistic leaders had a very negative 
effect on their performance. They inhibited the communication because 
of self-centeredness and authoritarianism."

<http://www.medicalnewstoday.com/releases/232512.php>http://www.medicalnewstoday.com/releases/232512.php 





"People Who experience mood swings, fear, voices and visions"