Fig. 6

Accuracy of the a posteriori probability (APP) of the Number of Contributor (NOC) using the selected model components. For n=1 to n=N_max=5, the APP is produced using an extended version of NOCIt [26] that accounts for differential degradation. 1% accuracy statistic is the frequency, over 819 Identifiler Plus samples (left panel) and 826 GlobalFiler samples (right panel), for which NOCIt produced an APP >0.01 for the true number of contributor(s) in the sample. For each sample, the B value of the decayed amplitude model was used to define 5 categories of degradation reported as Decay range