fisher: Calculate Fisher information for 3PL or GPC for multiple...

In yuehmeir2/myFormAssembler: myFormAssembler

Description

Calculate Fisher information for 3PL or GPC for multiple items and a vector of theta values

Usage

fisher(theta, IRT.par, IRT.model = "3PL", IRT.scale = 1.7, getTestInf = F)

Arguments

theta	A vector of ability values
IRT.par	A matrix of IRT parameters. This should have the columns required by the IRT model of choice.
IRT.model	A vector of character strings that specify the IRT model for each item. This can also be a single value, which will be recycled.
IRT.scale	A vector of scaling parameters used in the IRT models. This can also be a single value, which will be recycled.
getTestInf	A boolean indicating if item-level information or test information is wanted.

Value

If getTestInf = F, an item by theta matrix of Fisher information values is return; otherwise, a vector of test information vector is returned.

yuehmeir2/myFormAssembler documentation built on June 9, 2021, 3:42 a.m.