Before revision: Main models Four temperaments model Historically, in the second century A.D. , the physician Galen described four classical temperaments (melancholic, phlegmatic, sanguine and choleric), corresponding to the four humours or bodily fluids.
After revision: Main models Four temperaments model Historically, in the second century AD , the physician Galen described four classical temperaments (melancholic, phlegmatic, sanguine and choleric), corresponding to the four humours or bodily fluids.