Re: Can I compare two within-subjects' dependent variables while holding co-variates?

Posted by Art Kendall on Dec 19, 2011; 12:50pm
URL: http://spssx-discussion.165.s1.nabble.com/Can-I-compare-two-within-subjects-dependent-variables-while-holding-co-variates-tp5085591p5086059.html

Most likely a model that uses all of the design factors at the same time would be more appropriate.  But it is hard to say without more information about your data.

What are your variables? 
What level of measurement are they? 
How man levels are there? 
Do the levels represent all the possible levels for that variable or are they randomly chosen from among the possible values?
What role does each variable play independent, dependent, something to be controlled for?
Are co-variates measured once or at the same time as repeated DVs?
For repeated measures what is the nature of the repetition? time, before after, members of a pair of group (mother - father, teacher student, litter mates,etc.), different treatment conditions?

How did you select you subjects and gather your data?



On 12/19/2011 4:48 AM, NHR wrote:

Hello All,

I want to compare a series of dependent variables, and they are all within
subjects.
I already done a series of paired-sample t-test.
But now, I want to hold some independent variables as co-variates. However,
since these co-variates are also within-subjects, I'm not sure how can I do
that...
Someone told me vaguely of a way including parallel regressions and than
comparing the residuals...

So, can I compare two within-subjects' dependent variables while holding
co-variates?
 If so, can it be done in SPSS?

Thanks in advance!!

NHR

--
View this message in context: http://spssx-discussion.1045642.n5.nabble.com/Can-I-compare-two-within-subjects-dependent-variables-while-holding-co-variates-tp5085591p5085591.html
Sent from the SPSSX Discussion mailing list archive at Nabble.com.

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD