Two methods of ’equating’ tests are compared, one
using true scores, the other using equipercentile equating
of observed scores. The theory of equating is discussed.
For the data studied, the two methods yield
almost indistinguishable results.
Lord, Frederic M & Wingersky, Marilyn S. (1984). Comparison of IRT true-score and equipercentile observed-score "equatings." Applied Psychological Measurement, 8, 453-461. doi:10.1177/014662168400800409
Lord, Frederic M.; Wingersky, Marilyn S..
Comparison of IRT true-score and equipercentile observed-score "equatings".
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