I was working with a student recently, and I was reminded of a hugely important GMAT skill that doesn't often get discussed: the ability to avoid false certainty.
This issue arose--as it often does--pertaining to Reading Comprehension. As we discussed a passage, I asked her to tell me how confident she was she understood the main point of the passage. She was about 90% sure she got it. So I had her explain to me the passage. And she had not understood its major points. She had some nuggets, but some of them were subtly misunderstood (and in fact, in one instance the exact *opposite* of her interpretation was the case), and the thread connecting everything was missing.
This is hardly an uncommon experience.
You need to develop the skill of
knowing what you don't know. It is so much more useful to be 100% sure that you have no idea what a passage is driving at than to be 100% you
do, and be
wrong. The first can be corrected! You can keep reading and re-reading, piecing together the logic of the passage. The second is very hard to correct. Once your brain has 'bear-trapped' on an interpretation or line of reasoning that is incorrect, it's
very hard to un-bear-trap.
The GMAT is full of passages or problems that, by design, require time, effort, and thought to untangle, interpret, and figure out. The thing is, brains do not like to be confused. Evolution had two ways to deal with this discomfort: make someone work until the thoughts are correct, or have a brain trick itself to think it isn't confused even though it isn't right. Unfortunately for the GMAT, evolution chose the latter. Your brain will be begging you to let it go on autopilot and 'bear-trap': to get something *pretty close* or form a thought that uses similar vocabulary. But you need to recognize when this process is happening and hold your first interpretations up to close scrutiny.
It's very important to realize that there's nothing wrong with being *wrong*. Your brain's first, automatic thoughts are very hard to control. So there's nothing wrong with your brain being wrong at first. You just then have to *take executive control* (it's an executive reasoning test, after all), and mechanically work through the problem to get an accurate interpretation. Now--that's a difficult skill on its own, but it's one you *cannot improve* if you don't first recognize your brain trying to avoid doing it.