Modeling item responses as nominal data in IRT allows for improved test reliability, especially for the lower tail. Perhaps someone can figure out how to do this for upper tail as well. Overall gains are quite small though because few people in tails. https://www.mdpi.com/2079-3200/7/3/17/htm …pic.twitter.com/eyt5r4pAhU
7:55 AM - 15 Jul 2019
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