In various situations, a multiple-choice test item
may have more than one correct alternative, and the
goal is to determine how many correct alternatives an
examinee actually knows. For a randomly sampled examinee,
the validity of an item is defined as the probability
of deciding that the examinee knows i correct
alternatives, when in fact exactly i correct alternatives
are known. This article describes how latent class
models can be used to estimate this probability.
Wilcox, Rand R. (1985). Estimating the validity of a multiple-choice test item having k correct alternatives. Applied Psychological Measurement, 9, 311-316. doi:10.1177/014662168500900309
Wilcox, Rand R..
Estimating the validity of a multiple-choice test item having k correct alternatives.
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