All Psychometric Models Are Wrong

The British statistician George Box is credited with the quote,…
Adaptive testing conference

Want to learn more about adaptive testing? Attend IACAT.

Computerized adaptive testing (CAT) is an incredibly important…
cognitive diagnostic models

What are cognitive diagnostic models?

Cognitive diagnostic models are an area of psychometric research…
item response theory

How do I implement item response theory?

I recently received a email from a researcher that wanted to implement…

Guttman Errors: Additional Insight into Examinees

Guttman errors are a concept derived from the Guttman Scaling…
student essay rubric

What is a rubric?

What is a rubric? It's a rule for converting unstructured responses…

6 Reasons for Online Essay Marking

Why online essay marking? Essay questions and other extended…

Identifying and Dealing With Threats To Test Security

Test security is an increasingly important topic. There are several…

What is Item Banking? How can it improve my assessment?

Item banking refers to the purposeful creation of a database…
psychometrics in a fog

What is psychometrics supposed to be doing?

Today I read an article in The Industrial-Organizational Psychologist…