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Difficulty matters: Unspecific attentional demands as a major determinant of performance highlighted by clinical studies

  • Mario Bonato (a1) (a2), Marco Zorzi (a1) (a3) and Carlo Umiltà (a1)


The cognitive impairments shown by brain-damaged patients emphasize the role of task difficulty as a major determinant for performance. We discuss the proposal of Kurzban et al. in light of our findings on right-hemisphere–damaged patients, who show increasing awareness deficits for the contralesional hemispace when engaged with resource-consuming dual tasks. This phenomenon is readily explained by the assumption of unspecific depletable resources.



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