builtin_keys

<p>A key contains the item difficulty estimates from a given Rasch model.
The difficulty estimates (<code>tau</code>) are used to calculate D-scores.
D-scores can only be compared when calculated with the same key.</p>

datasets

The D-score summarizes the child's performance on a set of
milestones into a single number. The package implements four Rasch model
keys to convert milestone scores into a D-score. It provides tools to
calculate the D-score and its precision from the child's milestone scores,
to convert the D-score into the Development-for-Age Z-score (DAZ)
using age-conditional references, and to map milestone names into a
generic 9-position item naming convention.

Stef van Buuren

dscore

D-Score for Child Development

Iris Eekhout

Arjan Huizing

builtin_keys function

<p><code>builtin_keys</code> is a <code>data.frame</code> with variables:</p><table class="table">
<tr><td>Name</td><td>Label</td></tr>
<tr><td><code>key</code></td><td>String. Name of the key indicating the Rasch model</td></tr>
<tr><td><code>base_population</code></td><td>String. Name of the base population for the key</td></tr>
<tr><td><code>n_items</code></td><td>Number of items in the key</td></tr>
<tr><td><code>n_instruments</code></td><td>Number of instruments in the key</td></tr>
<tr><td><code>intercept</code></td><td>Intercept to convert logit into D-score</td></tr>
<tr><td><code>slope</code></td><td>Slope to convert logit into D-score</td></tr>
<tr><td><code>from</code></td><td>Starting value of the quadrature points</td></tr>
<tr><td><code>to</code></td><td>Stopping value of the quadrature points</td></tr>
<tr><td><code>by</code></td><td>Increment of the quadrature points</td></tr>
<tr><td><code>retired</code></td><td>Has the key been retired?</td></tr>
</table><p></p><p></p>

Format

Available keys for calculating the D-score — builtin_keys

<p><code>builtin_keys</code> is a <code>data.frame</code> with variables:</p><table class='table'>
<tr><td>Name</td><td>Label</td></tr>
<tr><td><code>key</code></td><td>String. Name of the key indicating the Rasch model</td></tr>
<tr><td><code>base_population</code></td><td>String. Name of the base population for the key</td></tr>
<tr><td><code>n_items</code></td><td>Number of items in the key</td></tr>
<tr><td><code>n_instruments</code></td><td>Number of instruments in the key</td></tr>
<tr><td><code>intercept</code></td><td>Intercept to convert logit into D-score</td></tr>
<tr><td><code>slope</code></td><td>Slope to convert logit into D-score</td></tr>
<tr><td><code>from</code></td><td>Starting value of the quadrature points</td></tr>
<tr><td><code>to</code></td><td>Stopping value of the quadrature points</td></tr>
<tr><td><code>by</code></td><td>Increment of the quadrature points</td></tr>
<tr><td><code>retired</code></td><td>Has the key been retired?</td></tr>
</table>



builtin_keys: Available keys for calculating the D-score

Description

Usage

Arguments

Format

Name	Label
`key`	String. Name of the key indicating the Rasch model
`base_population`	String. Name of the base population for the key
`n_items`	Number of items in the key
`n_instruments`	Number of instruments in the key
`intercept`	Intercept to convert logit into D-score
`slope`	Slope to convert logit into D-score
`from`	Starting value of the quadrature points
`to`	Stopping value of the quadrature points
`by`	Increment of the quadrature points
`retired`	Has the key been retired?