data.pisaPars

This data frame contains item parameters from two PISA studies.
Because the Rasch model is used, only item difficulties are considered.

Supplementary functions for item response models aiming
to complement existing R packages. The functionality includes among others
multidimensional compensatory and noncompensatory IRT models
(Reckase, 2009, <doi:10.1007/978-0-387-89976-3>),
MCMC for hierarchical IRT models and testlet models
(Fox, 2010, <doi:10.1007/978-1-4419-0742-4>),
NOHARM (McDonald, 1982, <doi:10.1177/014662168200600402>),
Rasch copula model (Braeken, 2011, <doi:10.1007/s11336-010-9190-4>;
Schroeders, Robitzsch & Schipolowski, 2014, <doi:10.1111/jedm.12054>),
faceted and hierarchical rater models (DeCarlo, Kim & Johnson, 2011,
<doi:10.1111/j.1745-3984.2011.00143.x>),
ordinal IRT model (ISOP; Scheiblechner, 1995, <doi:10.1007/BF02301417>),
DETECT statistic (Stout, Habing, Douglas & Kim, 1996,
<doi:10.1177/014662169602000403>), local structural equation modeling
(LSEM; Hildebrandt, Luedtke, Robitzsch, Sommer & Wilhelm, 2016,
<doi:10.1080/00273171.2016.1142856>).

Alexander Robitzsch

sirt

Supplementary Item Response Theory Models

data.pisaPars function

A data frame with 25 observations on the following 4 variables.<dl>
 <dt><code>item</code></dt>
<dd>Item names</dd> <dt><code>testlet</code></dt>
<dd>Items are arranged in corresponding testlets. These
 names are located in this column.</dd> <dt><code>study1</code></dt>
<dd>Item difficulties of study 1</dd> <dt><code>study2</code></dt>
<dd>Item difficulties of study 2</dd> 
</dl>

Format

Item Parameters from Two PISA Studies — data.pisaPars

A data frame with 25 observations on the following 4 variables.<dl>
 <dt><code>item</code></dt>
<dd>Item names</dd>

 <dt><code>testlet</code></dt>
<dd>Items are arranged in corresponding testlets. These
 names are located in this column.</dd>

 <dt><code>study1</code></dt>
<dd>Item difficulties of study 1</dd>

 <dt><code>study2</code></dt>
<dd>Item difficulties of study 2</dd>

 
</dl>

data.pisaPars: Item Parameters from Two PISA Studies

Description

Usage

Arguments

Format