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The Ravens Advanced Progressive Matrices (APM) is a widely usedmeasure of general intelligence (g), both across settings and cultures. Due to itslengthy 40-min administration time, several researchers have developed short-formscales, yet these forms typically yield a significantly lower reliability. This articledescribes the creation of an 18-item short form (APM-18) and its validation in threesamples of Southwestern U.S. university students (total N = 633). The APM-18 showssimilar psychometric properties to both the previously published 36-item long form and12-item short form, but retains a reliability estimate closer to the original APM. This,plus the shorter administration time (25 min) relative to the complete APM (40-60 min),makes it useful for time-constrained or mass-testing situations

Development and Validation of an 18-Item Medium Form of the Ravens Advanced Progressive Matrices