20. The system of claim 19 , wherein said biometric scoring and quality information regarding one or more subjects comprises, for each subject: a match/no-match score for a first measured biometric characteristic; a quality value for said first measured biometric characteristic; a match/no-match score for a second measured biometric characteristic; and a quality value for said second measured biometric characteristic.
20. The system of claim 19 , wherein said biometric scoring and quality information regarding one or more subjects comprises, for each subject: a match/no-match score for a first measured biometric characteristic; a quality value for said first measured biometric characteristic; a match/no-match score for a second measured biometric characteristic; and a quality value for said second measured biometric characteristic. 21. The system of claim 20 , wherein said computed parametric statistical conditional distributions comprise: a first match/no-match probability distribution for training match scores corresponding to said first measured biometric characteristic at one or more levels of quality; and a second match/no-match probability distribution for training match scores corresponding to said second measured biometric characteristic at one or more levels of quality.