Method evidence record
Polytomous Rasch Model
The Polytomous Rasch Model extends the dichotomous Rasch framework to ordered response scales with three or more categories, such as Likert items or partial-credit tasks. It estimates person ability and item difficulty on the same interval-level logit scale, and it tests whether the response categories function as intended — prerequisites for rigorous ordinal measurement.
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Polytomous Rasch Model
Taxonomic method record · latent-structure / psychometrics
- Masters, G. N. (1982). A Rasch model for partial credit scoring. Psychometrika, 47(2), 149–174. · DOI 10.1007/BF02296272
- Andrich, D. (1978). A rating formulation for ordered response categories. Psychometrika, 43(4), 561–573. · DOI 10.1007/BF02293814
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