set_block

empty_block

Prepare blocks of items and incorporate information
about which item belongs to which trait. A block
of items is a set of two or more items presented and answered together
by fully ranking them or selecting the most and/or least favorit
in a forced choice format. A whole test usually contains
several blocks and items may reappear in different blocks.

Fit Thurstonian Item Response Theory (IRT) models in R. This
package supports fitting Thurstonian IRT models and its extensions using
'Stan', 'lavaan', or 'Mplus' for the model estimation. Functionality for
extracting results, making predictions, and simulating data is provided as
well. References:
Brown & Maydeu-Olivares (2011) <doi:10.1177/0013164410375112>;
Bürkner et al. (2019) <doi:10.1177/0013164419832063>.

PaulChristian Buerkner

thurstonianIRT

Thurstonian IRT Models

Paul-Christian Bürkner

Angus Hughes

Trustees of Columbia University 

set_block function

<dl><dt>items</dt>
<dd>Names of item comparisons to be combined
into one block. Should correspond to variables in the data.</dd>
<dt>traits</dt>
<dd>Names of the traits to which each item belongs</dd>
<dt>names</dt>
<dd>Optional names of the items in the output.
Can be used to equate parameters of items across blocks,
if the same item was used in different blocks.</dd>
<dt>signs</dt>
<dd>Expected signs of the item loadings (1 or -1).</dd></dl>

Arguments

Prepare blocks of items — set_block

<dl>

<dt>items</dt>
<dd>Names of item comparisons to be combined
into one block. Should correspond to variables in the data.</dd>


<dt>traits</dt>
<dd>Names of the traits to which each item belongs</dd>


<dt>names</dt>
<dd>Optional names of the items in the output.
Can be used to equate parameters of items across blocks,
if the same item was used in different blocks.</dd>


<dt>signs</dt>
<dd>Expected signs of the item loadings (1 or -1).</dd>

</dl>

set_block: Prepare blocks of items

Description

Usage

Arguments

See Also

Examples