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:Theory of Mind Assessment Scale
The Theory of Mind Assessment Scale (Th.o.m.a.s., Bosco et al., 2009a) is a semi-structured interview using a unitary methodology to investigate the various aspects of ToM abilities and to delineate a comprehensive profile thereof (see Appendix A).
Category: