Arthur, another term may be "covariate". (In my own words...So do look for
a proper definition... covariates are variables that may have an impact on
the outcome but are outside of the study design.)
Here's the wikipedia entry - for a lack of a proper statistical or
econometric textbook in my hands.
https://en.m.wikipedia.org/wiki/Covariate
On Thu, Mar 23, 2017, 1:43 PM Ali Ilhan, <[log in to unmask]> wrote:
> I meant to say: you are not aware of but might be affecting the experiment
> (my last sentence). Sorry for that!
>
>
> On Thu, Mar 23, 2017 at 20:37 Ali Ilhan <[log in to unmask]> wrote:
>
> > Hi again,
> >
> > That would depend on the mathematical procedure that you are using and
> the
> > experimental setting, I think (I typically do not do experiments but help
> > other people with experimental data to analyse the results, so I do not
> > have a definitve say on this). Without having a concrete example to talk
> > on, it is hard to decide. The variables that you are not aware of are
> part
> > of the error term in certain statistical procedures. There are other
> > procedures, that control for all the time-invariant within unit variance
> > (such as fixed effects) even if you are not actually measuring or aware
> of
> > them. Am I making this more confusing ? :) Or if you are randomising in
> > an experimental setting, you would be still controlling for that kind of
> > variables that you are not aware of but might be expecting the
> experiment.
> >
> >
> > Ali
> >
> > On Thu, Mar 23, 2017 at 20:16 Luis A. Vasconcelos <[log in to unmask]>
> wrote:
> >
> > Hi ali,
> >
> >
> >
> > Thanks for your message! What if you are not controlling for them? What
> if,
> >
> > in fact, you are not aware of such variables?
> >
> >
> >
> > I know that what I'm looking for could be also framed as external or
> >
> > extraneous variables, but that doesn't tell much about whether such
> >
> > variables are a result of particular experimental procedures or maybe
> >
> > characteristics of the participants. I also came across 'situational
> >
> > variables', but these seem to refer more to the environment in which the
> >
> > experiments are conducted.
> >
> >
> >
> > I'm not sure!
> >
> >
> >
> > Best
> >
> >
>
>
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