Diana,
They aren't different mathematically. Thus, if one switched the description
of a predictor from being a nuisance variable to a covariate, there would be
no change in the regression results.
Eric
----- Original Message -----
From: "Eldreth, Diana L." <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, July 29, 2005 11:52 AM
Subject: [SPM] Nuisance vs. covariate
> Hi all,
>
> Could anyone tell me how nuisance variables and covariates are
> mathematically different in SPM? Thanks a million!!!!!
>
> Best regards,
>
> diana
|