You've just met Johanna, and find that she is outgoing, funny, and great at telling stories and jokes. If you were relying on the representativeness heuristic to guess what Johanna does for a living, you would be more likely to guess that she is a because you are .

 a stand-up comedian; ignoring information about base rates

Explanation: A stand-up comedian is a funny and humorous individual who entertains his audience by cracking jokes and making them laugh by comedy performed on stage.

I am guessing she is a stand up comedian because I am ignoring information about base rates. A stand up comedian will earn differently than a keynote speaker. Although a stand up comedian and a keynote speaker will both have the same characteristics.

answer; night terrors;