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 results of Deubel et al. (1996, 1998), Demeyer et al. (2010) and Tas et al. (2012) show clearly that inserting a post-saccadic blank improves people‚Äôs ability to judge which way the saccade target moved, whereas our results demonstrate that inserting a postsaccadic blank leads people to believe‚Ä¶
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