Researchers compared the scores from 204 leaders who took the personality test with subordinates' ratings of their charismatic leadership and found a pattern. These are based on assessing how bold, mischievous, colourful and imaginative someone is. Researchers from Ghent University measured the charisma of people by using 56 questions known as the charismatic cluster. The study assessed an individual's level of charisma by looking at how bold, mischievous, colourful and imaginative someone they were Donald Trump is widely considered to be a very charismatic leader but research suggests that too much can be a bad thing.