A Snapshot of g? Binary and Polytomous Item-Response Theory Investigations of the Last Series of the Standard Progressive Matrices (SPM-LS)
In this paper, published in Intelligence, we propose the use of the last series of the last series of the Standard Progressive Matrices (SPM-LS) as a viable snapshot measure of g. We provide an extensive Item-Response Theory (IRT) analysis of the instrument, based on the binary (pass/fail) and nominal (response categories) data.