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________________________________________ From: Thomas Nichols [mailto:[log in to unmask]] Sent: Monday, February 18, 2008 8:50 AM To: [log in to unmask] Subject: Re: [SPM] Calculating adjusted threshold from extent and p-value data? Tom, >If approximate inference is sufficient, and you know at least the FHWM >of >the noise smoothness, the snippet below will give you some idea of the >corrected P-value for a given FWHM, assuming a spherical search region of a >given radius. Is there a program in SPM can be used to estimate the FWHM of the noise smoothness, if I provide the noise images? Thanks, Hong