Hi Rubyyears,
The answer is Yes. You can always improve on things that you wanted to successful.
Before I did my Pilapt test with Cabair I prepared myself playing on Nintendo DS. Games like Sight Training and Brain Training are a good source to be practiced on. It gave my confidence a lift! I got a well above average score at the end of it.
In my belief, to do well on these test(s) is depended on how much concentration and focus you on to it.
Hope it helps.
n.dave