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. 2012 Jun 9;9:33. doi: 10.1186/1743-0003-9-33

Figure 7.

Figure 7

EEG results. a) The EEG mean power spectra of the Alpha and Beta band of each modality for all subjects. A higher Alpha suppression was found for the VF modality. b) When considering Subject 1 and 8 as outliers, we found a significantly statistical effect between the modalities. These results points out a higher attentional demand in the VF modality.