you need to check age and sex
On 11/28/17 3:46 AM, 박경일 wrote:
Dear experts,
I am trying to compare 2 groups with 2 covariates (age, sex) using qdec.
After loading data, design tab displays "diagnosis" in discrete, "age"
and "sex" in both continuous (covariates) and nuisance factor boxes.
I
Dear experts,
I am trying to compare 2 groups with 2 covariates (age, sex) using qdec.
After loading data, design tab displays "diagnosis" in discrete, "age" and
"sex" in both continuous (covariates) and nuisance factor boxes.
I just selected "diagnosis" and click "analyze". Is this a right way
age and iq can be entered as nuisance variables, where 'nuisance' means
'controlling for'.
n.
On Wed, 2010-12-29 at 13:14 -0500, Gallen, Courtney (NIH/NIDA) [F]
wrote:
> Hi,
>
>
>
> I’m running an analysis in Qdec in which I’d like to control for 3
> variables (1 discrete (sex), 2 continuous
Hi,
I'm running an analysis in Qdec in which I'd like to control for 3 variables (1
discrete (sex), 2 continuous (age and IQ)).
In the output after I run the model: I only see a reference to an effect of my
factor of interest controlling for sex (i.e., there is no contrast that also
explicitly
And for the comparison to be appropriate, you further have to make sure
that you are using the exact same main and interaction terms in SPSS as
are being used in QDEC. The mere presence of interaction terms in a model
can have big effects on the significance (or lack thereof) of the main
effects.
Depends on some of the details. Is spss demeaning the age? If so, are
you passing qdec demeaned ages? It can also be that it shows up better
in the ROI analysis (ROI analyses are often more powerful than map-based).
doug
Dankner, Nathan (NIH/NIMH) [F] wrote:
> Hi all,
>
> I've covaried age in a
Hi all,
I've covaried age in a group difference analyses on cortical thickness data
both in qdec for vertex-based and in spss for the gyral-based data. For the
vertex-based data, covarying age has almost no effect, and if anything
intensifies the group differences. However, when run in qdec,
