>What level can you get to in dual n back?
>How long have you been training.

I practiced a few years ago sporadically for maybe a couple of months. I don't think I would have had the discipline to do it longer than that. Can't remember exactly but I think I didn't progress more than 1 level per day and hit a wall around level 7. Just picked it up today and at first just 2 back was hard but then it was like my brain remembered how to do it and went straight to level 5 and hit a sticking point. Finally beat it with the minimum passing grade. So I guess even after years of not training you can quickly catch up to where you were.