plaus.val: IRT Plausible Values
In wasabi1989/MiscPsycho: Miscellaneous Psychometric Analyses

Description Usage Arguments Details Value Author(s) Examples

Draw random samples from the posterior density of an IRT Model

1	plaus.val(x, params, PV = 5, ind.dichot, M = 3, max = 5000, ...)

`x`	Vector of item responses
`params`	Item parameters organized as a list of lists
`PV`	Number of plausible values desired
`ind.dichot`	Denotes which items in x are multiple choice
`M`	Constant
`max`	Maximum length of vector for storing results
`...`	Further arguments passed to posterior

Uses Rejection Sampling to generate random samples from the IRT posterior density

Returns random samples from the posterior density of an IRT model

Harold C. Doran

# all mix
params <- list("3pl" = list(a = c(1,1), b = c(0, 1), c = c(0,0)),
               "gpcm" = list(a = c(1,1), d = list(item1 = c(0,1,2,3,4), item2 = c(0,.5,1, 1.5))))

plaus.val(x = c(0,1,2,2), params = params, ind.dichot = c(1,2))
plaus.val(x = c(0,1,2,2), params = params, ind.dichot = c(1,2), control=list(mu=2, sigma=3))