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Posts: 8 | Thanked: 0 times | Joined on May 2012
#8
you crunch the data, and look up patterns or differences in the data.
then pinpoint behaviours and mental and physical states based on those observations.

There is some interesting research regarding sleep, you can read it yourself,

http://www.biomedcentral.com/content...4-859X-7-5.pdf
http://science.education.nih.gov/sup...info-sleep.htm
http://thebrain.mcgill.ca/flash/d/d_...1_p_cyc.html#2