Wilcox, Rand R.2011-04-012011-04-011985Wilcox, Rand R. (1985). Estimating the validity of a multiple-choice test item having k correct alternatives. Applied Psychological Measurement, 9, 311-316. doi:10.1177/014662168500900309doi:10.1177/014662168500900309https://hdl.handle.net/11299/102187In 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.enArticle