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ASC's Blog:
Where Psychometrics Is Cool!

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Our Latest Articles

Adaptive testing

Multistage Testing

Multistage testing (MST) is a type of computerized adaptive testing (CAT).  This means it is an exam delivered on computers which dynamically personalize it for

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puzzle for test validation post
Test Development

Test validation

Test validation is the process of verifying whether the specific requirements to test development stages are fulfilled or not, based on solid evidence. In particular,

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globe for maximum likelihood estimation post

Maximum Likelihood Estimation

Maximum Likelihood Estimation (MLE) is an approach to estimating parameters for a model.  It is one of the core aspects of Item Response Theory (IRT),

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camera lenses for multidimensional item response theory

Multidimensional Item Response Theory

Multidimensional item response theory (MIRT) has been developing from its Factor Analytic and unidimensional item response theory (IRT) roots. This development has led to an

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pieces of paper for IRT c parameter post

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 b, and pseudo-guessing c. The

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laptop and numbers

What is a z-score?

A z-score measures the distance between a raw score and a mean in standard deviation units. The z-score is also known as a standard score

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standards file tab

Ebel Method of Standard Setting

The Ebel method of standard setting is a psychometric approach to establish a cut score for tests consisting of multiple-choice questions. It is usually used

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item parameter drift slide rule

Item parameter drift

Item parameter drift (IPD) refers to the phenomenon in which parameter values a given test item changes over multiple testing occasions within the item response

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Educational assessment in math - students taking a test

Speeded vs Power Test

The concept of Speeded vs Power Test is one of the ways of differentiating psychometric or educational assessments. In the context of educational measurement and

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