A Snapshot of g? Binary and Polytomous Item-Response Theory Investigations of the Last Series of the Standard Progressive Matrices (SPM-LS)
By Nils Myszkowski in Psychometrics Test development Item-Response Theory
What it’s about
In this paper, 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.
Abstract
Raven’s progressive matrices are widely used measures of general mental ability, but their length may not suit every research or applied setting. In this paper, we examine whether the last series of the Standard Progressive Matrices can be used as a shorter standalone measure. Using item-response theory models with data from 499 undergraduate students, we find that binary correct/incorrect responses show satisfactory unidimensional structure and reliability. We also examine full nominal responses, including information from distractor choices, and show that nested logit item-response models can improve reliability. The paper discusses the uses, limits, conditional reliability, and scoring strategies for this shorter version of the test.
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- Posted on:
- December 12, 2018
- Length:
- 1 minute read, 170 words
- Categories:
- Psychometrics Test development Item-Response Theory
- See Also: