DETECTION OF A SKILL DICHOTOMY USING STANDARDIZED ACHIEVEMENT TEST ITEMS

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Abstract
Multiple‐choice reading comprehension items from a conventional, norm‐referenced reading comprehension test are successfully analyzed using a simple latent class model. A classification rule for assigning respondents to “mastery” or “nonmastery” states is presented which simplifies the scoring procedure of Macready and Dayton (1977). A procedure is also derived for estimating the “true,” or “disattenuated,” latent cross‐classification of masters versus nonmasters for two tests, and illustrated using two sets of items from the same content domain. Results support the use of latent class, state mastery models with more heterogeneous item pools than has been advocated by previous authors.

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