Date:         Wed, 26 Apr 2006 10:35:03 +0200
Reply-To:     Marta García-Granero
              <biostatistics@terra.es>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Marta García-Granero
              <biostatistics@terra.es>
Organization: Asesoría Bioestadística
Subject:      Re: No ANCOVA for non-parametric test
In-Reply-To:  <20060422105421.73002.qmail@web86601.mail.ukl.yahoo.com>
Content-Type: text/plain; charset=ISO-8859-1

Hi Margaret,

I've found this paper (I was looking for something different, as it
happens):

Harwell MR & Serlin RC "An Empirical Study of a Proposed Test of
Nonparametric Analysis of Covariance" Psycological Bulletin 1988 104
268-81

(if you don't have access to the journal, I can send you a copy)

It might be interesting.

MM>   Thank you kindly providing this info.  A log transformation
MM> did not help and the residuals were not Normal and so I opted for
MM> the Conover-Iman approach in the end.  However, given the
MM> reservations expressed by some authors, I confess to looking out
MM> for other possible approaches to use in the future. :-)

Regards

Marta