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:In order to determine the severity of ASAD, Adulthood Separation Anxiety Checklist (ASA) (Diri√∂z et al., 2012; Manicavasagar et al., 2003) and Separation Anxiety Symptom Inventory (SASI) (Diri√∂z et al., 2012; Silove et al., 1993) were used.
Category: