A General Item Response Theory Model for Unfolding Unidimensional Polytomous Responses IRT GGUM
- Author(s):
- Roberts, James S.; Donoghue, John R.; Laughlin, James E.
- Publication Year:
- 2000
- Source:
- Applied Psychological Measurement, v24 n1 p3-32, Mar 2000
- Document Type:
- Article
- Page Count:
- 30
- Subject/Key Words:
- Item Response Theory (IRT), Attitude Measurement, Generalized Graded Unfolding Model (GGUM), Likert scale., Marginal Maximum Likelihood Estimation, Thurstone Scale