I’m not sure this is something that really needed thorough empirical research. Everyone who was perseverent enough to master the arts of meditation can immediately recognise beneficial effects even after a few sessions.
Perhaps it’s all about just giving your mind a break to recollect itself, we are shot at with so much bulk after all. I’m looking forward to the time when I’ll have enough courage and will to just sit down and deal with my mind’s demons.
Namaste!
via New Scientist