Tad Wintermeyer·3d ago“The Myth of Normal” and The Cost of Making ComparisonsThere are three kinds of lies: lies, damned lies, and statistics. The origin of the line is disputed, but the caution remains useful. The…
InPsochometrybyNasrina Siddiqi·Sep 24Cognitive Diagnostic Model Analysis and Mental Sets in LearningSometimes what we have learned in the past and the way we are trained as professionals can become the biggest roadblocks to newer learning…
Claus-Dieter Volko·Sep 23What is the real difference between average and gifted individuals?First of all, I’m not sure whether intelligence tests like the one used by Mensa can truly diagnose giftedness, because, in my opinion…A response icon1A response icon1
Yuya Tamai, MD, PhD·Sep 5The Psychometric Engine: CTT, IRT, and Meaningful Change in Clinical TrialsClassical Test Theory, Item Response Theory, and the Science of Meaningful Change Thresholds
InPsochometrybyNasrina Siddiqi·Aug 27The Unexpected Connection Between IRT Models and Instant NoodlesRasch, 2, 3 & 4 PL Models
InPsochometrybyNasrina Siddiqi·Aug 21CTT, IRT & the Things We Don’t Realize We’re MeasuringThis week’s topic is CTT versus IRT, but the social scientist in me wants to write about a fun little experiment I did a couple of days…
Leandre Sabourin·Aug 8Latent Variables in Psychometrics“This article is part of a series of articles on psychometrics and factor analysis. You can find all the other articles here: Factor…A response icon1A response icon1
Dr. Donald Easton-Brooks·Aug 3Why Most Researchers Misinterpret Cronbach’s AlphaAlmost every survey study reports it. You build a scale, you run the numbers, an alpha comes back, and if it clears 0.70 you move on with a…
Ehsan Barkhordar·Jul 31The frontier is exactly where HLE stops telling models apartAn IRT audit of 428 HLE items finds one factor behind the eight domain scores, and precision that peaks below where the best models sit.
InPsochometrybyNasrina Siddiqi·Jul 24Psychometry Explainer #2Is there such a thing as a psychometric item?
