Dear SPMers,
I depict, in the same figure, Bold activations rendered on the single
subject cortex originating from different GLMs. I prefer using old-style
rendering with a gradient colorbar. I assume that SPM sets the range of
the colorbar according to min and max values of the underlying data.
This causes the problem that weaker effects, in absolute terms, of one
GLM (with overall weaker effects) appear more significant (more yellow)
than stronger effects, in absolute terms, of another GLM (with overall
stronger effects). I couldn't find any helpful threads on this in the list.
Does anyone know how to set the range of the colorbar manually for SPM
rendering (Basically I am happy with entering just one max value
somewhere for all of my analyses)? Or some other quick fix to this problem?
I'd be very grateful.
Best
Jens
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Jens Kronschnabel, Ph.D. student
Department of Child and Adolescent Psychiatry, University of Zurich
Neumünsterallee 9, CH-8032 Zürich, Switzerland
+41 43 556 4081
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