Date:         Wed, 3 Feb 1999 15:36:03 -0500
Reply-To:     "Donald F. Burrill" <dburrill@USER.XTDL.COM>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU>
From:         "Donald F. Burrill" <dburrill@USER.XTDL.COM>
Subject:      Re: Trying to find appropriate technique
Comments: To: Andrew Gray <agray@commerce.otago.ac.nz>
Comments: cc: edstat-l@jse.stat.ncsu.edu, STAT-L@vm1.mcgill.ca
In-Reply-To:  <7252AB13940@jupiter.otago.ac.nz>
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Wed, 3 Feb 1999, Andrew Gray wrote:
 
> I'm trying to find an appropriate technique to model and/or test for
> relationships with an ordinal dependent variable and two interval and
> one nominal independent variables.  Any suggestions would be most
> appreciated.
 
        Is there any compelling reason (apart from the usual
unreasonable scales-of-measurement prejudices) for not treating the
dependent variable as though it were interval?  If it behaves nicely,
use it so;  if not, perhaps a nonlinear transformation would help.
If the nominal IV has only two levels, it too can be treated WLOG as
interval;  if it has more than 2 levels, I'd be inclined to entertain
what used to be called analysis of covariance (with 2 covariates, and
explicitly modelling all definable interactions).
                                                        -- Don.
 ------------------------------------------------------------------------
 Donald F. Burrill                                 dburrill@user.xtdl.com
 184 Nashua Road, Bedford, NH 03110                          603-471-7128