AGCT and Army Alpha
History and purpose After many concerns during World War II over the misassignment of soldiers into unsuitable roles and the underutilization of more capable soldiers, the US Army...
A community-sourced wiki dedicated to offering a comprehensive understanding of the science of mental ability.
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.
Essential stats concepts needed to interpret test data accurately.
Milestones in measuring general intelligence across history.
History and purpose After many concerns during World War II over the misassignment of soldiers into unsuitable roles and the underutilization of more capable soldiers, the US Army...
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Mean Definition: The arithmetic average of a set of scores. It is obtained by adding all observations ($\sum x$) and dividing by the total number of observations ($N$): $$ \mu = \f...
Misconceptions About IQ This page is still a work in progress and most sections are incomplete. This section aims to dispell popular myths regarding psychometrics and IQ. General...