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:…from the word meaning in a color–word Stroop task (Fan et al., 2003; MacDonald et al., 2000; MacLeod, 1991) or from flankers in a flanker task (Fan et al., 2003; Casey et al., 2000; Botvinick et al., 1999; Cohen & Shoup, 1997; Eriksen & Eriksen, 1974)] can be estimated as less than or equal…
Category: