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 perceptions of Roma
homogeneity by asking participants to indicate how similar they thought the Roma are to each other across several dimensions (e.g., ‘intellect’, ‘values’, ‘morality’; α = .91; see Kteily et al., 2015).
Category: