Next let me address how you can improve your score relative to problems with attention. This is for anyone with any level of distractedness - which is just about everyone these days.
Two recent articles that I have appeared on Beat the GMAT are to the point in terms of attention and timing. They are "stop multitasking now" link
https://www.beatthegmat.com/mba/2011/02/ ... asking-now and "why federer would beat nadal on the gmat" link
https://www.beatthegmat.com/mba/2011/01/ ... n-the-gmat
Let me say that I believe that the same strategies that work for people with attention issues are the same strategies that will work for most people. For example in reading comprehension the simple strategy of stopping at the end of each paragraph to refocus yourself and integrate what you have read, rather than pushing straight through or - worst of all skimming - has helped thousands of people on the GMAT achieve better reading comprehension scores, perhaps especially people who tend to get distracted.
Even more important is this, everyone should have a standard procedure to start each problem. The more likely you are to get distracted the more important this is. Do you know what your first steps are for every major problem type (CR, RC, SC, DS, PS)? If you first 30 to 45 seconds on each problem are automatic then you are less likely to get hung up. Also, your procedures should be ones that allow you to refocus if you need to in the middle of a problem.
Take Data Sufficiency, now here is the perfect opportunity to get hung up and either take way too long on a problem or get confused. An effective methodology that you repeat every time is crucial to accuracy and efficiency. I recommend that you begin each problem by identifying whether it is a yes/no question or a specific number question and write a symbol for that on your note board. Next write down the question that you are attempting to answer. These two simple steps will make it so that you are not relying on your memory to keep these things front and center for 3 minutes. Next write down any facts in the question stem, such as "x is an integer" or "xy > 0." Again, by taking a few seconds to write down these facts you are in a position to refocus is when working the question you get a little turned around. Also have some way of keeping track of the whether or not each statement is suff. or not sufficient. I write a little "S" or "NS" next to the statement on my note board. All of these things are designed to keep you focused and allow you to refocus.
I hope it helps you to think of things this way.