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:comparisons of the current results of TMS effects received from the tactile unimodal WM task with the previous findings of TMS effects received from a tactile-visual cross-modal WM task (Ku et al., 2015), the authors believe that it is a reasonable assumption that the
Category: