[Mediation-information] Reg a doubt in mediation

[dustin tingley]

Hi-

I recommend that you consult the papers at this website.
http://imai.princeton.edu/projects/mechanisms.html

Which answer all of the questions you list below.

best,
Dustin


Dustin Tingley
Government Department
Harvard University
http://scholar.harvard.edu/dtingley
Director, Program on Experience Based Learning in the Social Sciences
http://projects.iq.harvard.edu/peblss/
Contribute to the Research Reservoir:
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On Thu, Mar 8, 2012 at 11:38 AM, M Subbiah <sisufive5 at yahoo.com> wrote:

> I would like to convey that, we dont have a formal training in
> mediation-moderation analysis, and through the reference cited above and
> other such materials we are able understand and implement the methods (in R
> specifically)
>
> We have attempted the procedure elaborated in (2) for a data set (pertain
> to a study on extent of search by students) using 3 independent variables
> (IV) and one mediating (M) variable. All IV, Mediating and dependent
> variables (DV) are metric.
>
>  *Please find the attachment for the diagram depicts the relation *
>
> We have attempted the procedure (in R) as
> b <- lm(MOT ~ TP + PC + PK, data=MOD3)
> c <- lm(EXS ~ MOT+TP + PC + PK, data=MOD3)
> OP <- mediate(b, c, sims=10,boot = TRUE, treat="PK", mediator="MOT")
>
> *Your valuable clarification needed:*
>         I.            We run three times by replacing the IV in “treat=
> “. Is this a right approach to study the mediating effect?
>       II.            Please explain how to interpret the outputs (though
> we understand the point and interval estimates) ACME, Mediation Effect,
> Direct Effect, Total Effect, Proportion of Total Effect via Mediation.
>
> It will be of more useful if you could help us to clarify and use the
> methods more reasonably well
>
> We thank in advance for your advice and suggestion
>
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