Dear SPM authors and users,
I want to apply the statistical power analysis described in "Detecting
activations in PET and fMRI:levels of inference and power", Neuroimage 40,
223-235 (1996). In page 227, under the topic "A Power Analysis" it is said
that "The shape of the signal is characterized by the width (f) of the foci
expressed as a proportion of W". I cannot clearly understand what is meant
by "the signal" and how we get this f value or what it corresponds to. I'm
not a statistical expert and I'll appreciate any help on this.
Thanks,
Tugan Muftuler
****************************************
L. Tugan Muftuler, Ph.D.
Research Imaging Center
Irvine Hall 164
University of California
Irvine, CA, 92697-5020
Tel: (949) 824-6290
fax: (949) 824-3481
E-mail: [log in to unmask]
****************************************
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|