maxInfo_xPL: Dichotomous Max Info

In akaat/MTBfx: Functions to support Mobile Toolbox analysis

Dichotomous Max Info

Description

This function takes parameters from a dichotomous item bank and a target theta estimate. It calculates the item information at the target theta values (using the TIF_xPL function), and organizes the items from maximum to minimum information provided.

Usage

maxInfo_xPL(iparFull, targTheta)

Arguments

iparFull	A matrix with rows for items and three columns. The first column is the slope, the second is the intercept (not the threshold), and the third is the guessing parameter (on the original scale, not on the logit scale).
targTheta	The target theta at which the item information is to be calculated and the next item chosen.

Value

This function returns a vector of integers indicating row numbers from iparFull with the maximum information provided at the target theta value.

See Also

Other dichotomous functions: MLE_xPL(), TIF_xPL(), dichEngine()

akaat/MTBfx documentation built on June 6, 2023, 11:43 p.m.