ASC’s Blog: Resources on Assessment, Psychometrics, & Edtech
ASC continually posts new resources and articles on our blog, covering industry news, scholarly conferences, and discussions of important psychometric concepts. See the most recent articles in the blog below.
Response Time Effort
Wise and Kong (2005) defined an index to flag examinees not putting forth minimal effort, based on their response time. …
Holland K Index and K Variants for Forensics
The Holland K index and variants are probability-based indices for psychometric forensics, like the Bellezza & Bellezza indices, but make…
Guttman Errors: Additional Insight into Examinees
Guttman errors are a concept derived from the Guttman Scaling approach to evaluating assessments. There are a number of ways…
Identifying Threats To Test Security
Test security is an increasingly important topic. There are several causes, including globalization, technological enhancements, and the move to a…
Flag Exam Cheating with Time-Score Analysis
Psychometric forensics is a surprisingly deep and complex field. Many of the indices are incredibly sophisticated, but a good high-level and…
What is a Psychometrician? Definition, roles, & careers.
A psychometrician is a data scientist who studies how to develop and analyze exams so that they are reliable, valid,…
What can Machine Learning tell us about our item banks?
Artificial intelligence (AI) and machine learning (ML) have become buzzwords over the past few years. As I already wrote about,…
Ways the Word “Standard” is used in Assessment
If you have worked in the field of assessment and psychometrics, you have undoubtedly encountered the word “standard.” While a…
The Generalized Partial Credit Model (GPCM)
The generalized partial credit model (GPCM, Muraki 1992) is an item response theory (IRT) model designed to work with items…
R for psychometrics
If you are dealing with data science, which psychometrics most definitely is, you’ve probably come across R. It is an…
Subject Matter Experts (SME) in Exam Development
Subject matter experts are an important part of the process in developing a defensible exam. There are several ways that…
Is teaching to the test a bad thing?
One of the most cliche phrases associated with assessment is “teaching to the test.” I’ve always hated this phrase, because…
MICROCAT: What was assessment like in the 1980s?
ASC has been empowering organizations to develop better assessments since 1979. Curious as to how things were back then? Below…
What is the two parameter IRT model (2PL)?
Item response theory is the predominant psychometric paradigm for mid or large scale assessment. As noted in my introductory blog…
What is the three parameter IRT model (3PL)?
Item response theory (IRT) is an extremely powerful psychometric paradigm that addresses many of the inadequacies of classical test theory…
What is classical item facility?
Classical test theory is a century-old paradigm for psychometrics – using quantitative and scientific processes to develop and analyze assessments…
How to get a graduate degree or training in psychometrics
I’m also frequently asked by people already in the field where they can go to get a graduate degree in psychometrics, especially on sophisticated topics like item response theory…
What is the Hofstee method for setting cutscores?
Have you heard about standard setting approaches such as the Hofstee method, or perhaps the Angoff, Ebel, Nedelsky, or Bookmark…