I agree that would make sense if BOTH hatches were fake, but if the need to push the button is a real scientific one, why muddle it with a psychology experiment?
For example, if the whole thing was a psych experiment, I could see them setting up one group to see if they would keep pushing the button, and a second to see how long they would keep recording the data. But if the first group was NOT an experiment, which it seems it wasn't, why go to a scientific site that deals with intense electromagnetism and set up your psychology experiment there? It doesn't seem a single group would be interested in both an electro magnetic energy project and a psychology experiment.
Just my take.