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Use one-sample t-test with a covariate in SPM8 to get the statistical maps. The spmT map will provide you with the significance of the covariate (e.g. where the correlation is significant) The r-values are not saved. If you want the r-values, then you will need to use imcalc with the equation: sqrt((i1.^2)/((i1.^2)+df)) where i is the spmT map for the contrast 1 over the covariate column. df is n-2, where n is the number of subjects. Best Regards, Donald McLaren ================= D.G. McLaren, Ph.D. Postdoctoral Research Fellow, GRECC, Bedford VA Research Fellow, Department of Neurology, Massachusetts General Hospital and Harvard Medical School Office: (773) 406-2464 ===================== This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is intended only for the use of the individual or entity named above. If the reader of the e-mail is not the intended recipient or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that you are in possession of confidential and privileged information. Any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited and may be unlawful. If you have received this e-mail unintentionally, please immediately notify the sender via telephone at (773) 406-2464 or email.