infoWI

Calculates an index representing the product of a test information function and an ability distribution.

Extends 'ACER ConQuest' through a family of functions
designed to improve graphical outputs and help with advanced analysis
(e.g., differential item functioning). Allows R users to call
'ACER ConQuest' from within R and read 'ACER ConQuest' System Files
(generated by the command `put` <https://conquestmanual.acer.org/s4-00.html#put>).
Requires 'ACER ConQuest' version 5.33.2 or later.
A demonstration version can be downloaded from <https://shop.acer.org/acer-conquest-5.html>.

Dan Cloney

conquestr

An R Package to Extend 'ACER ConQuest'

Ray Adams

infoWI function

<dl><dt>myItems</dt>
<dd>A vector of item deltas.</dd>
<dt>myAbilities</dt>
<dd>A vector of person abilities.</dd>
<dt>type</dt>
<dd>A character String. Should the test information be calculated empirically
("empirical" - default) or analytically using moments of distribution ("approx").</dd></dl>

Arguments

infoWI — infoWI

<dl>

<dt>myItems</dt>
<dd>A vector of item deltas.</dd>


<dt>myAbilities</dt>
<dd>A vector of person abilities.</dd>


<dt>type</dt>
<dd>A character String. Should the test information be calculated empirically
("empirical" - default) or analytically using moments of distribution ("approx").</dd>

</dl>

infoWI: infoWI

Description

Usage

Value

Arguments

Examples