Tag Archives: Statistics

2015 SIOP Conference

SIOP2015Hi all!

I’ll be at the 2015 SIOP conference this week in Philadelphia to present two posters.  The first poster is on Friday at 10:30, and it is entitled “The Importance of Person-Specific Approaches in Expatriate Research.”  It notes the necessity to understand the person and person-specific processes when analyzing longitudinal changes in expatriates, which is often a focus of research and practice.  The second poster is also on Friday at 3:30, and it is entitled “Are Head-Mounted
Virtual Reality Systems Useful for Training and Education?”  The study analyzes the confusing outcomes when HMVRSs are used for training purposes.  Both of them will be in Franklin Hall.  If you are at the conference, come by and check them out!

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.