Army General Classification Test (AGCT)
Explores the Army General Classification Test (AGCT): its history, purpose, renormalization, g-factor validity, and predictive power.
A community-sourced wiki dedicated to offering a comprehensive understanding of the science of human intelligence.
Start here for a concise overview of psychometric science.
Quick answers to the most common psychometric queries.
Addressing various IQ misconceptions which have permeated pop culture.
Explore the general intelligence factor and its empirical support.
Statistics glossary overviewing essential terms and concepts.
Documenting the generational rise in IQ scores and its proposed causes.
Ask in-depth questions about IQ, psychometrics, intelligence theory, statistics, and cognitive science.
Explores the Army General Classification Test (AGCT): its history, purpose, renormalization, g-factor validity, and predictive power.
Evidence on the stability of IQ across the lifespan, and how IQ changes with age, including differences between fluid and crystallized abilities, processing speed, working memory, and biological influences.
Explains the g factor (general intelligence): how it emerges from shared variance across cognitive tests, its hierarchical structure, g-loadings, what g is and is not, and why it predicts learning, job performance, and other real-world outcomes.
A beginner-friendly glossary of core statistics and concepts used in psychometrics and IQ testing.