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:Various theoretical accounts of this effect have been provided in the literature (see MacLeod, 1991; Aron, 2007, for reviews), but the most classical one invokes solving a conflict between the reading and naming response tendencies (Cohen et al., 1990).
Category: