ERIC Number: ED208023
Record Type: RIE
Publication Date: 1981-Apr
Reference Count: 0
Score Equating and Item Response Theory: Some Practical Considerations.
Cook, Linda L.; Eignor, Daniel R.
The purposes of this paper are five-fold to discuss: (1) when item response theory (IRT) equating methods should provide better results than traditional methods; (2) which IRT model, the three-parameter logistic or the one-parameter logistic (Rasch), is the most reasonable to use; (3) what unique contributions IRT methods can offer the equating process; (4) what work has been done that relates to the confidence that can be placed in the IRT equating results; and (5) what unresolved issues exist in the application of IRT to equating. Several issues are discussed to provide a background: formal definitions and requirements of equating; the basic principle of IRT equating; procedures for linking parameter estimates and deriving estimated true and observed score equatings using IRT; the practical advantages to be gained from using IRT equating; and the important distinction between test development and test analysis activities. (Author/BW)
Publication Type: Speeches/Meeting Papers; Guides - Non-Classroom; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A
Identifiers: One Parameter Model; Rasch Model; Three Parameter Model
Note: Paper presented at the Annual Meeting of the American Educational Research Association (65th, Los Angeles, CA, April 13-17, 1981).