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:The trait agreement (rT) is computed separately for each of K personality traits across all N pairs of judges, while the profile agreement (rP) is calculated across K personality traits for each individual target-judge pair (Allik et al., 2015).
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