Robust and Unbiased Variance of GLM Coefficients for Misspecified Autocorrelation and Hemodynamic Response Models in fMRI
Figure 4
Ratios of estimated and true contrast variance when the correlation structure is correctly specified as an AR() process as a function of the AR() parameter . The methods displayed are: OLS (black, dotted line), GLS (green, dashed-dotted line), smooth with (red, dashed line), smooth with (red, long-dashed line), and sandwich (blue, solid line).
