Yes, it is very common to have this kind of evaluation and it is OK no matter how you do on it. I had one when applying for SSD. My attention span wasn't so hot either, nor could I repete 10 minutes later a list of items. It is OK to be just who you are, in what ever condition you are. Try not to get upset, and just relax a bit when you go there. Most of the people who administer these tests are kind and compassionate. I will keep you in my thoughts and prayers. ginnie