All tests are designed with statistics in mind, and they have demonstrated what skills and aptitudes pilots should have in order to make a good airman. Having that in mind i could say that every test that will be conducted during the whole process (as they explained during introductions) can be considered an aptitude test. The content of the tests will not be revealed by anyone for obvious reasons, and try not to make any conclusions from when i mention the word aptitude... they will not sit you on a flight simulator to fly a precision approach if thats what you had in mind.
Also, try not to believe most of the rumors out there, we are lucky that the examiners are very straight forward, normal people and will answer any question that you make during the process. They did mention pprune and facebook and it felt like they were actually sorry that they couldn't cope with all the information thirst that all applicants have shown. They simply have no time to explain everything to each applicant. So, again, just relax, and know that this is one of many chances we will have to achieve our goal of becoming a pilot. As always, good luck.