I am a bass player who plays primarily in a cover band and does side projects. I was recently diagnosed with ADHD. I am 38 and now that I know about this situation it has brought some interesting thoughts and realizations to my attention. Before I knew of my condition, I just accepted that I miss notes and changes because I must not be as good at learning songs as I thought. I quietly accepted this and just treated it as "how I am". Distraction does not just effect your memorized songs - you can be reading from charts or manuscript and still have random, miscellaneous thoughts pop up that cause you to lose your place and make mistakes. This is how ADD works - random, miscellaneous thoughts are spontaneously generated while you are in the middle of doing stuff. So even though I transcribed my songs and had my notes available on stage, I would still make silly mistakes. Now I know, and with medication my focus is a lot more intact and I don't seem to get 'distracted by my own thoughts' mid-song any more. This little bit of knowledge has helped me improve as a player and as a member of my bands and projects. I am now more inspired then ever to learn new things and to get back into lessons. Just a thought for the group. If you find that you are prone to distraction and are dropping changes and missing notes that you should not be, you may want to consider that there is a reason and that it can be fixed.