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Deficits in decoding EFE are relevant in social contexts in which information from 2 or more sources may be processed simultaneously. To assess the role of contextual stimuli on EFE processing in AD, we analyzed the ability of patients with AD and healthy elderly adults to identify EFE when simultaneously performing another task. Each of the 6 basic EFEs was presented to 15 patients with AD and 35 controls in a dual task paradigm that is in parallel with a visuospatial or a semantic task. Results show that the decoding of EFEs was impaired in patients with AD when they were simultaneously processing additional visuospatial information, yet not when they were performed in conjunction with a semantic task. 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