ERIC Number: EJ605896
Record Type: Journal
Publication Date: 2000-Mar
Reference Count: N/A
A General Item Response Theory Model for Unfolding Unidimensional Polytomous Responses.
Roberts, James S.; Donoghue, John R.; Laughlin, James E.
Applied Psychological Measurement, v24 n1 p3-32 Mar 2000
Develops a generalized graded unfolding model that allows for either binary or graded responses and generalizes previous item response models for unfolding in two useful ways. It implements a discrimination parameter that varies across items and permits response category threshold parameters to vary across items. (Author/SLD)
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A