Science method is polysomnography.

  And to find that a human true being as genetical owl  , thus a using polysomnography.  This test doing at stationary within 7-8 hours a sleep  and entering a electroencephalography, ECG, EMG, AS checking muscles work capacity, pulse oximetry , and other tracking  indexes.

After when you are understood, that who you are ,thus let s check a description for your psychologic  portrait, by psychologists created.