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:…‘‘understanding the brain by creating the brain” was coined to synthesize how humanoid robots and computational neuroscience could contribute to progresses in naturalizing human psychology and the underlying neurophysiology (Asada et al., 2001; Brooks, 1997; Cheng et al., 2007; Kawato, 2008).
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