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:…et al., 2009), executive functions/working memory (Martis et al., 2003; Bloch et al., 2008), procedural learning (O’Connor et al., 2005), language (Triggs et al., 1999), memory (Triggs et al., 1999; Martis et al., 2003; Fabre et al., 2004; Kuroda et al., 2006,), motor speed (Martis et al.,…
Category: