Psychometrics

All Psychometric Models Are Wrong

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

Want to learn more about adaptive testing? Attend IACAT.

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

What are cognitive diagnostic models?

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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…
analytics-pencils-guttman

Guttman Errors: Additional Insight into Examinees

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

What is a rubric?

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

6 Reasons for Online Essay Marking

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Why online essay marking? Essay questions and other extended…
test-security-threats

Identifying and Dealing With Threats To Test Security

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

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

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

What is psychometrics supposed to be doing?

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