Hi list,<div><br></div><div>I'm performing cortical thickness on three group of subject. I have also three covariates (age, gender and educational level).&nbsp;</div><div><br></div><div>I'm doing:</div><div><br></div><div>1-built a .fsgd file</div><div>2-mris_preproc</div><div>3-mri_surf2surf</div><div>4-mri_glmfit</div><div>5-Bonferroni correction</div><div><br></div><div>Are those processes correct?&nbsp;</div><div><br></div><div>Alternatively should I use qdec option? In this way, when should I use it?</div><div><br></div><div>Thank you very much,</div><div><br></div><div><br></div><div>Stefano</div>