Figure 3

Effect of vocoder degradation on BOLD signal variation. A. General regression with vocoder degradation. Plots are presented for the peaks in the left and right temporal regions: L STG/STS at (-57 -15 6) and R STG/STS at (60 -24 -3), the horizontal slice at the coordinate z = -3 (p < 0.0001). IS-I ntelligible S peech, US-U nintelligible S peech, ES-E nvironmental S ounds. In each group, the darker the color, the higher the level of vocoder degradation. The level of degradation in this analysis was transformed to the logarithmic scale being the logarithm of the inverse number of channels n: log(1/n). In each group, the darker the color in the bar graphs of BOLD signal variation, the higher the level of vocoder degradation. B. Interaction between Category and Degradation (factorial analysis of IS, US and ES, contrast weights restricted to IS and US) in the regions of interest from the "All effects" contrast. Plots are presented for the peaks in the left and right temporal regions: L STG at (-57-18 15) and R STG at (57-27 15), the horizontal slice at the coordinate z = 15. In each group, the darker the color in the bar graphs of BOLD signal variation, the higher the level of vocoder degradation.