Fig. 3.
Results from the hierarchical clustering and the single-subject fitting. A) Cumulative map frequency of the N1 maps: the CI-CHD users, but not the NH listeners or CI-SSD users, show a condition effect, with more frequent N1 map presence for AV-V compared to A. The corresponding map topographies are displayed on the right side, with Map B being referred to as the N1 topography. B) Cumulative map frequency of the P2 maps: there is a group effects (independent of the condition): NH listeners reveal a more frequent presence of a P2 topography (Map C) compared to CI-SSD users, and CI-SSD users show a more frequent presence of a P2-like topography (Map E) compared to NH listeners. CI-CHD users show a more frequent presence of Map D compared to NH listeners. Additionally, there is a condition effect (independent of the group): The presence of the P2-like topography (Map E) is enhanced for AV-V compared to A. This suggests a visual modulation of auditory speech processing at P2 latency in all groups. Significant differences are indicated (* , ** , *** ).