Friendship is the hardest thing in the world to explain. It's not something you learn in school. But if you haven't learned the meaning of friendship, you really haven't learned anything.
Muhammed Ali
After the participants played the game, they were presented with a questionnaire, containing 60 items. It was designed to gain insights into how well the participants got to know one another, and how the system could be improved. An example page of the questionnaire can be seen here, all of the questions are mentioned in the thesis.