Figure 5.

The single-regressor NIRS model MSE plotted against the reference model MSE for 100 voxels selected using the value of the baseline NIRS-fMRI correlation for each voxel. The data is separated into three bands on the basis of ${\text{R}}_{\text{base}}^2$. The average reduction in MSE for all data points is shown in figure 5d. The MSE between the synthetic and recovered HRFs decreases as a function of ${\text{R}}_{\text{base}}^2$. The error bars in figure 5d show the standard deviation across all data points of figures 5a–5c.