ASC's Blog:
Where Psychometrics Is Cool!

(well, it always is…)

Keep on reading for easy-to-digest articles on psychometric topics, industry news, and guest posts from experts.

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Generalized-partial-credit-model
Psychometrics

All Psychometric Models Are Wrong

The British statistician George Box is credited with the quote, “All models are wrong but some are useful.”  As psychometricians, it is important that we

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fasttest test statistics tif sem
Education

Item response theory software

I recently received a email from a researcher that wanted to implement item response theory, but was not sure where to start.  It occurred to me

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nedelsky method meeting
Education

What is a rubric?

What is a rubric? It’s a rule for converting unstructured responses on an assessment into structured data that we can use psychometrically. Why do we

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Online Essay Marking Scoring
Education

6 Reasons for Online Essay Marking

Why online essay marking? Essay questions and other extended constructed response (ECR) items remain a mainstay of educational assessment.  From a purely psychometric perspective, they

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Credentialing

Item Writing Tips

With so many things to consider, it’s no wonder psychometricians often recommend the retirement of poor performing items. Here are some of the most common

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bias scales
Credentialing

What is Test Scaling?

I often hear this question about scaling, especially regarding the scaled scoring functionality found in software like FastTest and Xcalibre.  The following is adapted from

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