ERIC Number: ED236207
Record Type: RIE
Publication Date: 1983-Jul
Reference Count: 0
Comparison of IRT Observed-Score and True-Score 'Equatings.'
Lord, Frederic M.; Wingersky, Marilyn S.
Two methods of 'equating' tests using item response theory (IRT) are compared, one using true scores, the other using the estimated distribution of observed scores. On the data studied, they yield almost indistinguishable results. This is a reassuring result for users of IRT equating methods. (Author)
Publication Type: Reports - Research
Education Level: N/A
Sponsor: Office of Naval Research, Arlington, VA. Personnel and Training Research Programs Office.
Authoring Institution: Educational Testing Service, Princeton, NJ.