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: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).
Category: