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:Dot Probe Reliability
To estimate the reliability of the bias scores, a permutation approach was used (e.g., MacLeod et al. 2010; Enock et al. 2014; Waechter et al. 2014).
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