Category Archives: Statistics Help

New Stats Help Page on Serial Mediation / Sequential Mediation

SerialMediationHi all!

I just uploaded a new page on the “Stats Help” portion of my website.  The link is here: Sobel Test Formula for Serial Mediation / Sequential Mediation .

In short, I spent much too long finding the sobel test formula for the indirect effect of X on Y through M1 and M2 in a serial mediation / sequential mediation.  To prevent this from happening to other researchers (and possibly myself again), I provide a brief summary of mediation, sobel tests, and serial mediation / sequential mediation.  Then, I provide the relevant sobel test formula.

If you want to know more about serial mediation / sequential mediation, please contact me at mch248@psu.edu.  I’m always happy to chat about stats!

Two New Stats Help Pages! Both on p-Values

jacob-cohenToday, I uploaded two new pages to the “Statistics Help” tab on my website.
They are:

The Meaning of p-Values: A Guide for Social and Organizational Science
Students & Researchers

The p-Value Controversy: A Guide for Social and Organizational Science Students &
Researchers

As apparent from the titles, both pages focus on p-values.  Whenever I teach a class, about statistics or otherwise, students seem to only care about p-values when understanding studies’ results.  Unfortunately, much is still unknown if only
p-values are interpreted.  The first page provides an overview into the theory, logic, and calculation of p-values.  The second page reviews the controversy of p-values – one that is still ongoing today.

If you are still confused about p-values after reading these two pages, please email me at mch248@psu.edu.  We can chat, and I can figure out additions to the pages to clarify the concepts.