sim {irtoys} | R Documentation |
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. |
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))