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:We assessed support for drone strikes using five items (e.g., “I
support America’s use of drone attacks against suspected militant targets in Yemen”; α = .87; see Kteily et al., 2014, 2015).
Category: