Open AccessCOMPARISON OF IRT OBSERVED‐SCORE AND TRUE‐SCORE ‘EQUATINGS’ *
Author(s) -
Lord Frederic M.,
Wingersky Marilyn S.
Publication year - 1983
Publication title -
ets research report series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.235
H-Index - 5
ISSN - 2330-8516
DOI - 10.1002/j.2330-8516.1983.tb00026.x
Subject(s) - equating , item response theory , statistics , test score , mathematics , econometrics , psychology , psychometrics , standardized test , rasch model
Two methods of ‘equating’ tests using item response theory 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.