“…In a review of the literature, Egan and his colleagues (Egan, Hobson & Fearing, 2006) write that researchers have identified progressive difficulties "with instrumental and personal activities of daily living among persons with dementia, although the speed of decline in function" varies individually (p. 133; see also Nygård, Amberla, Bernspång, Almkvist & Winblad, 1998;Rusted & Sheppard, 2002;Wharton & Monk, 2008). Often neuropsychological theories have been used to explain this decline (see for instance Cooper, Schwartz, Yule & Shallice, 2005;Giovannetti, Libon, Buxbaum & Schwartz, 2002;Schwarz, 2006).…”