Last month, filmmaker Errol Morris published a quiz on the New York Times website, titled "Are you an Optimist or a Pessimist?" Participants answered questions about safety in the modern era and their life outlooks. On the surface, the quiz seemed straightforward.

In actuality, Morris was using the quiz to test people on something quite different. To make the quiz, Morris used a computer program that randomly changed the book passage to one of six different fonts every time a new user opened the page. The aim of the experiment was to see how people respond to different fonts.

Errol Morris joins The Takeaway with the results.