Posted by
Mike on
Aug 16, 2017; 8:32pm
URL: http://spssx-discussion.165.s1.nabble.com/Runing-contrast-tests-in-a-2x2x2-tp5734662p5734664.html
Hi, just a couple of points:
(1) Bruce's response is the first message to make it to the
SPSS mailing list (unless my email had a temporary psychotic
break with reality).
(2) It would be nice if the OP would specify which contrast(s)
need to be done. If we use A, B, and C represent the independent
variables, then is it some contrast in a 2-way interaction or
the 3-way interaction that needs to be done?
(3) I could be wrong but I think there are some errors on the
page Bruce links to, specifically in the syntax provided.
I don't use Unianova often (I generally use GLM), but
shouldn't the first line of syntax be:
Unianova DEP by A B with X
where X is the covariate? That's how it's done in GLM and
apparently in Unianova if one goes by the examples on
this webpage:
https://www.ibm.com/support/knowledgecenter/es/SSLVMB_21.0.0/com.ibm.spss.statistics.help/syn_unianova_examples.htmIf this really error, I worry what else is incorrect in the info.
Just checkin.
-Mike Palij
New York University
[hidden email]
----- Original Message -----
From: "Bruce Weaver" <
[hidden email]>
To: <
[hidden email]>
Sent: Wednesday, August 16, 2017 4:11 PM
Subject: Re: Runing contrast tests in a 2x2x2
> It would help if you generated a small dataset to illustrate the
> problem, and
> showed the syntax for what you have tried so far.
>
> Also, given that it is a 2x2x2, I wonder if you can get what you want
> via
> EMMEANS with COMPARE. There is an example in the Command Syntax
> Reference
> manual entry for UNIANOVA. You may be able to modify it to get the
> contrast
> you want.
>
>
https://www.ibm.com/support/knowledgecenter/es/SSLVMB_21.0.0/com.ibm.spss.statistics.help/syn_unianova_emmeans.htm>
> HTH.
>
>
> itwardus wrote
>> I am having some serious difficulty with getting my contrast test to
>> run
>> in my 2x2x2 ANCOVA. However I keep getting this error: This L matrix
>> is
>> not estimable. Hypothesis tests cannot be computed.
>>
>>
>> I have tried to run both a Special Contrast and a LMatrix. Could
>> someone
>> help me set up the syntax that I would need to test between two
>> conditions
>> for DV1 by A B C WITH CV1?
>>
>> Thanks in advance.
>
>
>
>
>
> -----
> --
> Bruce Weaver
>
[hidden email]
>
http://sites.google.com/a/lakeheadu.ca/bweaver/>
> "When all else fails, RTFM."
>
> NOTE: My Hotmail account is not monitored regularly.
> To send me an e-mail, please use the address shown above.
>
> --
> View this message in context:
>
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