Ark, L. Andries and Bergsma, Wicher P. (2010) A note on stochastic ordering of the latent trait using the sum of polytomous item scores. Psychometrika, 75 (2). pp. 272-279. ISSN 0033-3123
In contrast to dichotomous item response theory (IRT) models, most well-known polytomous IRT models do not imply stochastic ordering of the latent trait by the total test score (SOL). This has been thought to make the ordering of respondents on the latent trait using the total test score questionable and throws doubt on the justiﬁability of using nonparametric polytomous IRT models for ordinal measurement. We show that a broad class of polytomous IRT models has a weaker form of SOL, denoted weak SOL, and argue that weak SOL justiﬁes ordering respondents on the latent trait using the total test score and, therefore, the use of nonparametric polytomous IRT models for ordinal measurement.
|Additional Information:||© 2010 Springer|
|Library of Congress subject classification:||H Social Sciences > HA Statistics|
|Sets:||Departments > Statistics|
|Date Deposited:||14 Apr 2011 14:10|
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