CAT_ability_est_group: Ability level estimation for a group using a CAT decision...

Description Usage Arguments Value Author(s) Examples

View source: R/CAT_ability_est_group.R

Description

Computes the test takers' estimated ability level based on the CAT decision tree previously built and the test takers' responses to every item at every tree level

Usage

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Arguments

cat.dt

A cat.dt object returned by CAT_DT.

res

Matrix containing the test takers' responses to every item. Rows represent each individual and columns represent the responses given to each item

Value

A list of lists containing the following elements for each individual:

$estimation Estimated ability level after each level of the tree.

$linf Lower limit of the final estimation at 95

$lsup Upper limit of the final estimation at 95

$items Administered item in each level.

$graphics Plot object of the evolution of the ability level estimation. It shows the ability level estimation after the individual has answered to every administered item.

Author(s)

Javier Rodríguez-Cuadrado

Examples

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# data("itemBank")
# Build the cat.dt
# nodes = CAT_DT(bank = itemBank, model = "GRM", crit = "MEPV",
#                C = 0.3, stop = c(2, 0.5), limit = 100, inters = 0.8,
#                p = 0.8, dens = dnorm, 0, 1)

# Estimate the ability level of a subject with responses res
# CAT_ability_est_group(nodes, res = itemRes)

cat.dt documentation built on March 31, 2021, 5:07 p.m.