The Kang (2023) Psychometrika paper applies sequential generalized likelihood ratio (GLR) testing to a problem that has become increasingly pressing as testing has moved online and continuous: detecting when item parameters in an operational test bank have drifted. The core issue is straightforward—if item difficulty, discrimination, or guessing parameters change …
The Anselmi, Robusto, and Cristante (2023) paper in Applied Psychological Measurement proposes a methodological refinement to a setting that sits awkwardly between two well-developed bodies of psychometric theory: batteries of unidimensional tests, where each test measures a single ability but the abilities are correlated. The standard CAT machinery treats each …
The Jouve-Cerebrals Test of Induction (JCTI) is a computer-adaptive nonverbal measure of inductive reasoning published in its current form by Cogn-IQ. The Jouve (2023) concurrent-validity study, paired with the comprehensive evidence base now consolidated in the 2025 technical manual, places the test among the better-validated short-form fluid-reasoning instruments available outside …
The Jouve-Cerebrals Crystallized Educational Scale (JCCES) is a three-subtest cognitive battery — verbal analogies, mathematical problems, and general knowledge — built on the Cattell-Horn-Carroll (CHC) framework with primary loading on crystallized intelligence (Gc) and a secondary quantitative-knowledge (Gq) component. Across cross-battery factor analyses, JCCES indicators load strongly on a general …
Most cognitive ability tests in widespread use are either verbal-heavy (vocabulary, comprehension, knowledge) or rely on a fixed sequence of items that takes everyone a similar amount of time. The Jouve Cerebrals Figurative Sequences (JCFS), developed by Xavier Jouve, takes a different approach on both fronts. It is purely nonverbal …
The Jouve-Cerebrals Word Similarities (JCWS) is a 150-item open-response verbal-reasoning test built around a distinctive item format that combines partial-letter cues with semantic and analogical reasoning. Each item presents a target word’s letters scrambled or partially given, plus a verbal clue: for example, “(A _ I K L N T) …
The I Am a Word (IAW) test is a 100-item open-ended vocabulary measure (plus 50 experimental items) developed by Xavier Jouve in 2011 and revised through 2025. Each item presents a meaning and a structural constraint; the examinee produces the target word rather than selecting among alternatives. The test outputs …
For about a century, average IQ test scores in industrialized countries rose steadily — roughly three points per decade — across cohort after cohort. James Flynn documented and named the phenomenon. The puzzle was how a population could be getting genuinely smarter so fast, when biological evolution operates on a …
The National Institutes of Health Toolbox Cognition Battery (NIHTB-CB) is a brief, iPad-based battery of cognitive tests that has become one of the most widely-used cognitive assessment tools in research over the past decade. It was originally developed for research on healthy populations across the lifespan, then adapted for use …
Cronbach’s coefficient alpha is the most-reported reliability statistic in psychology and educational measurement. It is also one of the most-misunderstood. The classical formula assumes that test items measure a single construct with equal factor loadings (tau-equivalence), uncorrelated errors, and continuously distributed scores. Real psychological measurement rarely meets all three assumptions: …
