Calculate RMSEA fit value.
A fitted (and valid) arf-model object of class "model".
An "options" object. The options object belonging to the ARF model is loaded by default.
RMSEA calculates the RMSEA value using the number of brain voxels (Set by the
Returns an object of class "model" with the slot
model@fit set to the RMSEA value.
Wouter D. Weeda - firstname.lastname@example.org