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:…N I N G M E M O R Y www.learnmem.org
ies that used object-based DNMS tasks (Aggleton et al. 1986; Rothblat and Kromer 1991; Jackson-Smith et al. 1993; Kesner et al. 1993; Rawlins et al. 1993; Shaw and Aggleton 1993; Yee and Rawlins 1994; Glenn and Mumby 1996; Mumby et al. 1996; Cassaday and…
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