Statistics Lectures Now on YouTube!

Every semester, I try to upload my lectures to the University of South Alabama’s course management site, and, every semester, I run out of space before the halfway mark of the semester.  Our IT department recently recommended that I upload my videos to YouTube to avoid these space difficulties.  So, I am doing just that!

I already uploaded my first two lectures.  The first is a general review of statistics with a focus on descriptive statistics and p-values.  The second is an overview of one-variable chi-square tests and the chi-square test of independence (also called two-variable chi-square tests).  The links are provided below:

Lecture 1 – Review –

Lecture 2 – Chi-Square –

As always, if you have any questions or comments, please contact me at

More Issues with P-Values

Hi all!  I just made a new post on about p-values.  Use the following link to read more!

If you have any specific topics that you’d like to read about, please let me know by emailing

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 &

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  We can chat, and I can figure out additions to the pages to clarify the concepts.