Simulate response data
Simulate responses from the 1PL, 2PL, or 3PL model
sim(ip, x = NULL)
ip |
Item parameters: a matrix with one row per item, and three
columns: [,1] item discrimination a, [,2] item difficulty b, and
[,3] asymptote c. Can also use the object returned by |
x |
A vector of values of the latent variable ("abilities"). |
A matrix of responses: persons as rows, items as columns, entries are either 0 or 1, no missing data
Ivailo Partchev
pa <- cbind(runif(20,.8,2), runif(20,-2.4,2.4), rep(0,50)) rs <- sim(ip=pa, x=rnorm(1000))
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