expected_score: Calculate expected item scores for 3PL or GPC for multiple...

In yuehmeir2/myFormAssembler: myFormAssembler

Description

Calculate expected item scores for 3PL or GPC for multiple items and a vector of theta values

Usage

expected_score(
  theta,
  IRT.par,
  IRT.model = "3PL",
  IRT.scale = 1.7,
  is_percent_scale = 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.
is_percent_scale	if TRUE, the expected percent score for the given thetas will be returned, which is the tcc.

Value

An item by theta matrix of expected item scores

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