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:reliability Reliability was estimated by two aspects: one was internal consistency through the value of Cronbach’s α for the total score of the AIR-C scale and the other was test–retest reliability, which was done by calculating the intra-class correlation coefficient (ICC) for absolute agreement between two tests.(31,32) A Cronbach’s α of .
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