This is a well thought to quiz. It wasn't too long or too short. I feel like it was the perfect length. I didn't expect to get as many of the questions right as I did and the question I got wrong I absolutely expected to get them wrong. The end of the quiz refers you to two articles assumably written by the author. It would have helped if those articles were linked. I really would like to read them after taking this quiz. I would hope they would include the answers and links to the reference material used as research.