ERIC Number: ED475828
Record Type: RIE
Publication Date: 2002-Jun
A Continuation Ratio Model for Ordered Category Items.
Continuation ratio logits are used to model the possibilities of obtaining ordered categories in a polytomously scored item. This model is an alternative to other models for ordered category items such as the graded response model and the generalized partial credit model. The discussion includes a theoretical development of the model, a description of special cases, maximum marginal likelihood estimation of the item parameters, and estimation of ability. Comparisons of the item response theory models for ordered category items are presented using empirical data. (Contains 8 tables, 12 figures, and 36 references.) (Author)
Publication Type: Reports - Descriptive; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A
Note: Paper presented at the Annual Meeting of the Psychometric Society (Chapel Hill, NC, June 23, 2002).