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.
The Graded Response Model – Samejima (1969)
Samejima’s (1969) Graded Response Model (GRM, sometimes SGRM) is an extension of the two parameter logistic model (2PL) within the…
What is Automated Essay Scoring?
Automated essay scoring (AES) is an important application of machine learning and artificial intelligence to the field of psychometrics and…
What ChatGPT brings us for item writing
Even those ones who do not consider themselves technology buffs have heard about ChatGPT. Today, everybody is talking about ChatGPT—a…
Artificial Intelligence (AI) in Education & Assessment: Opportunities and Best Practices
Artificial intelligence (AI) is poised to address some challenges that education deals with today, through innovation of teaching and learning…
Coefficient Alpha Reliability Index
Coefficient alpha reliability, sometimes called Cronbach’s alpha, is a statistical index that is used to evaluate the internal consistency or…
Differential Item Functioning (DIF)
Differential item functioning (DIF) is a term in psychometrics for the statistical analysis of assessment data to determine if items…
“Dichotomous” Vs “Polytomous” in IRT?
What is the difference between the terms dichotomous and polytomous in psychometrics? Well, these terms represent two subcategories within item…
Gamification in Learning & Assessment
Gamification in assessment and psychometrics presents new opportunities for ways to improve the quality of exams. While the majority of…
Meta-analysis in Assessment
Meta-analysis is a research process of collating data from multiple independent but similar scientific studies in order to identify common…
How do I develop a test security plan?
A test security plan (TSP) is a document that lays out how an assessment organization address security of its intellectual…
Multistage Testing
Multistage testing (MST) is a type of computerized adaptive testing (CAT). This means it is an exam delivered on computers…
Test validation
Test validation is the process of verifying whether the specific requirements to test development stages are fulfilled or not, based…
Maximum Likelihood Estimation
Maximum Likelihood Estimation (MLE) is an approach to estimating parameters for a model. It is one of the core aspects…
Multidimensional Item Response Theory
Multidimensional item response theory (MIRT) has been developing from its Factor Analytic and unidimensional item response theory (IRT) roots. This…
The IRT Item Pseudo-guessing Parameter
The item pseudo-guessing parameter is one of the three item parameters estimated under item response theory (IRT): discrimination a, difficulty…
The IRT Item Discrimination Parameter
The item discrimination parameter a is an index of item performance within the paradigm of item response theory (IRT). There…
Automated Item Generation
Automated item generation (AIG) is a paradigm for developing assessment items (test questions), utilizing principles of artificial intelligence and automation….
The IRT Item Difficulty Parameter
The item difficulty parameter from item response theory (IRT) is both a shape parameter of the item response function (IRF)…