(well, it always is…)
Keep on reading for easy-to-digest articles on psychometric topics, industry news, and guest posts from experts.
One of the best aspects of my position is the opportunity to travel the world and talk with many experts about psychometrics and educational assessment.
Validity, in its modern conceptualization, refers to evidence that supports our intended interpretations of test scores (see Chapter 1 of APA/AERA/NCME Standards for full treatment).
One of the core concepts in psychometrics is item difficulty. This refers to the probability that examinees will get the item correct for educational/cognitive assessments or respond
It’s October 30, 2017, and collusion is all over the news today… but I want to talk about a different kind of collusion. That is,
If you deal with data science on a daily basis, which psychometrics most definitely is, you’ve probably used R. R is an environment that allows
In the past decade, terms like machine learning, artificial intelligence, and data mining are becoming greater buzzwords as computing power, APIs, and the massively increased availability
An emerging sector in the field of psychometrics is the area devoted to analyzing test data to find cheaters and other illicit or invalid testing
Last week, I had the opportunity to attend the 2017 Conference on Test Security (COTS), hosted by the University of Wisconsin-Madison. If your organization has
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
Cognitive diagnostic models are an area of psychometric research that has seen substantial growth in the past decade, though the mathematics behind them, dating back
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
Guttman errors are a concept derived from the Guttman Scaling approach to evaluating assessments. There are a number of ways that they can be used.
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
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
Test security is an increasingly important topic. There are several causes, including globalization, technological enhancements, and the move to a gig-based economy driven by credentials.
