Ipsative Testing: An Update
I recently received a reply to an old blog that I had on the OPRA blog. My response covers some of the
The Insignificance of Significance Testing
This week, scientists from around the world have made a call to stop the over-reliance on the use of statistical significance testing
Usefulness Trumps Validity
Validity is perhaps one of the most misunderstood concepts in HR analytics and psychometrics in particular. The real question should be “How useful is this assessment or intervention?”
Data Is an Ingredient Not the Meal: 5 Key Things to Think About to Begin Turning Data Into Information
Unless you have been shut off from the outside world in recent times you are probably aware that big data is one
The Cross Over Benefits of Willpower
The photo above was taken 18 years ago moments before I took the stage in a regional bodybuilding competition in New Zealand.
The Myth That Criterion Related Validity Is a Simple Correlation Between Test Score and Work Outcome
This is a myth that can be discussed with relative simplicity: Criterion validity is far more than the simple correlations that are
Attacking the Myth That Personality Tests Don’t Add Value
For this month’s myth, the last on the topic of psychometrics, I have chosen a slightly different approach. I’m coming out in
The Myth of Impartiality: Part 2
This month, I look at the myth of impartiality from the perspective of the users (HR professionals and recruiters) and suppliers of psychometrics.
The Myth of Measurement
I would like to begin by apologising for not getting a myth out last month. I was working in the Philippines. Having
The Myth of Significance Testing
When I decided to leave work and go to University to study psychology I did so because of a genuine fascination with