information: mfc item and test information
In fcirt: Forced Choice in Item Response Theory

Description Usage Arguments Value Examples

View source: R/methods_information.R

This function calculates mfc item and test information.

1	information(x, approach, theta, information, items)

`x`	returned object
`approach`	Estimation approaches used for parameters. They can be "direct", which is direct approach, and "two step", which is two step approach. The default is direct approach.
`theta`	Type of theta values used. They can be "quadrature", which is -3, -2.9, -2.8, -2.7...2.9, 3, and "estimated", which is estimated theta values. The default is quadrature.
`information`	Types of information.They can be "item", which is overall item information, and "test", which is overall test information. The default is overall item information.
`items`	The items of which information to be calculated. The default is all the items.

Selected item information or overall test information

Data <- c(1)
Data <- matrix(Data,nrow = 1)
pairmap <- c(1,2)
pairmap <- matrix(pairmap,nrow = 1)
ind <- c(1,2)
ParInits <- c(1, 1, 1, -1, -1, -1)
ParInits <- matrix(ParInits, ncol = 3)
mod <- fcirt(fcirt.Data=Data,pairmap=pairmap,ind=ind,ParInits=ParInits,iter=3,warmup=1,chains=1)
information(mod, approach="direct", theta="quadrature", information="item", items=1)