(well, it always is…)
Keep on reading for easy-to-digest articles on psychometric topics, industry news, and guest posts from experts.
The One Parameter Logistic Model (OPLM or 1PL or IRT 1PL) is one of the three main dichotomous models in the item response theory (IRT)
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
The borderline group method of standard setting is one of the most common approaches to establishing a cutscore for an exam. In comparison with the
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
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
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
Item fit analysis is a type of model-data fit evaluation that is specific to the performance of test items. It is a very useful tool
Distractor analysis refers to the process of evaluating the performance of incorrect answers vs the correct answer for multiple choice items on a test. It
Educational assessment of mathematics achievement is a critical aspect of most educational ministries and programmes across the world. One might say that all subjects at school
Multi-modal test delivery refers to an exam that is capable of being delivered in several different ways, or of a online testing software platform designed
A confidence interval for test scores is a common way to interpret the results of a test by phrasing it as a range rather than
Predictive Validity is a type of test score validity. Validity, in a general sense, is evidence that we have to support intended interpretations of test
A composite test score refers to a test score that is combined from the scores of multiple tests, that is, a test battery. The purpose
Inter-rater reliability and inter-rater agreement are important concepts in certain psychometric situations. For many assessments, there is never any encounter with raters, but there certainly
Certification exam delivery is the process of administering a certification test to candidates. This might seem straightforward, but it is surprisingly complex. The greater the
