Date: Thu, 16 Dec 2010 18:22:29 -0800
Reply-To: Bruce Weaver <email@example.com>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Bruce Weaver <firstname.lastname@example.org>
Subject: Re: Can I use time and gender as covariates in Ancova?
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You can include them as "fixed factors", as Art suggested on Dec 15.
> Thanks for your comment. Unfortunately, I do not have the actual age, only
> age described in 15 different categories.....will this then mean that I
> not use this as covariates? Do you have any advice?
> 2010/12/16 Bruce Weaver [via SPSSX Discussion] <
>> PetterBB wrote:
>> Hi I thought that with the use of ANCOVA the analysis will adjust the
>> of the outcome variable to what they would be if all subjects scored
>> on the covariates; gender and age....it this wrong?
>> Petter Bae Brandtzæg.
>> One of the problems you're running into in this thread is terminological.
>> In SPSS lingo, covariate = continuous (or scaled) explanatory variable,
>> factor = categorical explanatory variable. So the variables you are
>> describing as "covariates" are being seen by Art (and others) as
>> because you have age categories, not age as a continuous variable. Do
>> have the actual ages? If so, why are you treating it as categorical?
>> Bruce Weaver
>> "When all else fails, RTFM."
>> *NOTE: My Hotmail account is not monitored regularly.
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>> To unsubscribe from Can I use time and gender as covariates in Ancova?,
> Petter Bae Brandtzæg
> Ustvedtsvei 14b O871 Oslo
> Tlf + 4792806546
"When all else fails, RTFM."
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