I have a question: I'm taking the ASTB in two weeks. I remember my recruiter saying something about if you're applying for Intel, you have to take some of the other sections of the test besides the basic 3 that make up the OAR. However, he has not been helpful at all- I emailed him to ask what those other sections are so I can study for them, but he hasn't answered yet and I HAVE to buckle down on those! Does anyone know?
Yes, you have to take the whole ASTB:
Math Skills Test (MST)
Reading Skills Test (RST)
Mechanical Comprehension Test (MCT)
Spatial Apperception Test (SAT)
Aviation and Nautical Information Test (ANIT)
Aviation Supplemental Test (AST)
The first three make up the OAR, and are primarily aptitude tests. In other words, other than perhaps brushing up on long division or your multiplication tables, there isn't a lot of "studying" that can make those portions much better. What's most helpful there is to take timed sample tests to give you a feeling for how much time you have on each section.
The Spatial Apperception Test component is the one that shows a landscape as it would appear from the cockpit of an aircraft, and then shows airplanes in different orientations. You then identify which aircraft represents that landscape as seen from its cockpit. This is again largely an aptitude test, but if this isn't your cup of tea, some practice can help, here, too.
The Aviation and Nautical Information Test is the one you can study for. It's completely aviation and nautical terms, "trivia", concepts, principles, etc. As others have said, it's "a mile wide and an inch deep". Study as many of the resources as you can. It is NOT in-depth; it's very broad, but very basic.
The Aviation Supplemental Test could have question types from any of the prior sections. In my case, the AST was actually just another whole math test, and had ONLY math questions...nothing from nautical or aviation. Some folks have gotten another ANIT-type test, others have apparently had a mix, etc. This piece of the test is used as part of the formula to contribute to your scores.
If you read through this thread and other threads in the ASTB section of this forum, you'll find everything you need to know and more. If you look at this post above, the items linked there are the common resources people use for studying. The Barrons and Arco books are great for their sample tests, as is the Marine Gouge.
Basically, you are taking the ASTB the same way someone applying for aviation takes it. Good luck!