Dear SPMers, I used to collect the y signal from the Y.mat file with SPM96. It seems that y and Y signals collected from the plot function with SPM99 are not identical this first one (SPM96). Both SPM99 y and Y signals are dependant on the selected contrast, which was not the case with SPM96. Could anyone tell me how I can collect this "independant" signal with SPM99. Thanks S. RUFF INSERM U.455 F-31059 Toulouse