Adjustment for confounders for testing equality of variance

#1
Dear all

I wonder if there is a method that allows to adjust for confounding variables when testing for the equality of variances.
I am comparing two methods concerning their precision. Unfortunately there are other factors which also play a role and which in the experiment cannot be controlled, but can be measured. Is there a way in any test for testing equality of variances to adjust?

Thanks for your help.

Lisa
 

Karabiner

TS Contributor
#2
I'd suppose that you regress your dependent variables on your confounders and
then perform the test for equaluty of variances on the residuals.

With kind regards

K.