Method evidence record

Polytomous Construct Validity

Polytomous construct validity refers to the evaluation of whether a scale composed of ordered, multi-category items (e.g., Likert or rating-scale items) genuinely measures the intended latent construct. It extends classical validity frameworks to polytomous measurement models — such as the Graded Response Model or Generalized Partial Credit Model — ensuring that ordered response categories function as designed and that the resulting scores reflect the target construct.

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Polytomous Construct Validity Assessment

Taxonomic method record · latent-structure / psychometrics

Muraki, E. (1992). A generalized partial credit model: Application of an EM algorithm. Applied Psychological Measurement, 16(2), 159–176. · DOI 10.1177/014662169201600206
Embretson, S. E., & Reise, S. P. (2000). Item Response Theory for Psychologists. Lawrence Erlbaum Associates. · ISBN 978-0805828191

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Related methods

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Taxonomic bucketConfirmatory factor analysismachine-suggested · Relational suggestion, not evidence.Taxonomic bucketDifferential Item Functioningmachine-suggested · Relational suggestion, not evidence.Same method familyEFAmachine-suggested · Relational suggestion, not evidence.Same method familyGRMmachine-suggested · Relational suggestion, not evidence.Same method familyPCM / GPCMmachine-suggested · Relational suggestion, not evidence.Taxonomic bucketPolytomous Rasch Modelmachine-suggested · Relational suggestion, not evidence.