This fabricated multiple-choice test consists of 27 items administered to 496 examinees. The data were randomly generated to demonstrate various psychometric models (e.g., 2PL-NLM and 3PL-NLM).
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A data frame in wide-format with 496 examinees' responses to 27 items.
The first column is the examinee ID and the remaining columns are the responses to the items. Each item has four response options: 1=A, 2=B; 3=C; and 4=D. The answer key is as follows: key=c(4,3,2,3,4,3,2,3,1,4,3,2,3,3,4,2,4,3,3,2,2,1,2,1,1,2,1)
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