Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:To test our model predictions, the extrinsic test data were overlaid on the mosaic of models and evaluated through Kappa analysis (Cohen 1960) and receiver– operator characteristic (ROC) analysis (Hanley and McNeil 1982) as more reliable measurements, (Pearce and Ferrier 2000; Manel et al.
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