Hello!
Allow me to start with saying "Sigh"...
I am an atheist myself with agnostic awareness and this study hits in with just one of my major pet peeves: false claims about points proven.
First of all, I would like to see that "belief test" which is able to prove how much faith a person has. People's responses can be influenced by many things, like prestige, so I am wondering about the influence of "The Thinker". I mean, you show that image to a person and then offer them some choice that obviously (?) runs counter to that image which may be considered prestigious, due to the balance of power between tester and participant.
Secondly, depending on the test, its results may also be influenced by the "doubt" people have. "Doubt" as such is a part of faith, the insecurity which is at the core of all our fundamental beliefs. None of us were around to watch God create the world, or witness the Big Bang, or whatever explanation we favor, so no one knows for sure, and thus, there is always "doubt" (also with atheists).
Third, as has been hinted by some posts, materialism/athesim is not way beyond religious belief. The structure and style may be different, as well as some standard elements, but in the very end, as mentioned under secondly, its about things we can't verify ourselves.
Going hand-in-hand with this last point, analytical thinking is actually not the exclusive providence of atheism. You can very much use analytical thinking together with religious belief, although you need to work a little harder to get over those chains binding analytical thinking to materialism. Likewise, in the end, atheism is an intuitive belief itself - it is absolutely impossible to proof the existance or non-existance of God(s) without first defining a world which in itself already contains an assumption about the (non-)existance of deities.
Thus, I have lots of doubts about the usefulness and veracity of this "test".
Yours,
Deathworks