Mind talking a little bit about the technology that you're using and how it's worked out for you? I've been running EEG studies for years, and those small headband-type readers are notorious for being so finnicky as to be almost useless, especially since they have no way of controlling for eye motion. I've never seen a decent setup for anything less than 5-10 grand, and even then they need Ag-AgCl electrodes with conductive gel, which it looks like you've managed to avoid.