There's a fair bit of research on this subject. For example http://www.sciencedi...

		kstenerud on Feb 6, 2012 \| parent \| context \| favorite \| on: Zap your brain into the zone: Fast track to pure f... There's a fair bit of research on this subject. For example http://www.sciencedirect.com/science/article/pii/S1053811910...