data.activity.itempars

List with item parameters for cultural activities
of Austrian students for 9 Austrian countries.

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.activity.itempars function

The format is a list with number of students per group
(<code>N</code>), item loadings (<code>lambda</code>) and
item intercepts (<code>nu</code>):<code>List of 3</code> 
<code> $ N : 'table' int [1:9(1d)] 2580 5279 15131 14692 5525 11005 7080 ...</code> 
<code> ..- attr(*, "dimnames")=List of 1</code> 
<code> .. ..$ : chr [1:9] "1" "2" "3" "4" ...</code> 
<code> $ lambda: num [1:9, 1:5] 0.423 0.485 0.455 0.437 0.502 ...</code> 
<code> ..- attr(*, "dimnames")=List of 2</code> 
<code> .. ..$ : chr [1:9] "country1" "country2" "country3" "country4" ...</code> 
<code> .. ..$ : chr [1:5] "act1" "act2" "act3" "act4" ...</code> 
<code> $ nu : num [1:9, 1:5] 1.65 1.53 1.7 1.59 1.7 ...</code> 
<code> ..- attr(*, "dimnames")=List of 2</code> 
<code> .. ..$ : chr [1:9] "country1" "country2" "country3" "country4" ...</code> 
<code> .. ..$ : chr [1:5] "act1" "act2" "act3" "act4" ...</code>

data.activity.itempars: Item Parameters Cultural Activities

Description

Usage

Arguments

Format