Well, my take on these questions is they are trying to establish a base of questions which:
- everyone agrees is factually true
- only Christians say is true
- only atheists say is true
- some may agree is factually true, others may not (eg my hair is black)
- everyone agrees is false
- some agree is false based on belief
- some agree is unknown to them
It will be quite interesting to see what areas of the brain light up when people respond to certain questions. You can find the paper he co-authored called Functional Neuroimaging of Belief, Disbelief, and Uncertainty here
(about the 3rd down the list).
I think (if I understand correctly) that this is the next stage of tests following on from that paper.