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:Neuropsychological test variables used in the present analyses include Mini-Mental State Examination (MMSE)
 [35], Clinical Dementia Rating scale global & sum of boxes scores [36], Category Fluency (animal naming), Trailmaking tests A & B, WAIS Digit-Symbol substitution, Wechsler Logical Memory delayed recall, and the Wechsler Adult Intelligence Scale-revised (WAIS-R) forward and reverse digit span tests.
Category: