data.mc

Dataset of responses from multiple choice items, containing 143 students
on 30 items.

Includes marginal maximum likelihood estimation and joint maximum
likelihood estimation for unidimensional and multidimensional
item response models. The package functionality covers the
Rasch model, 2PL model, 3PL model, generalized partial credit model,
multi-faceted Rasch model, nominal item response model,
structured latent class model, mixture distribution IRT models,
and located latent class models. Latent regression models and
plausible value imputation are also supported. For details see
Adams, Wilson and Wang, 1997 <doi:10.1177/0146621697211001>,
Adams, Wilson and Wu, 1997 <doi:10.3102/10769986022001047>,
Formann, 1982 <doi:10.1002/bimj.4710240209>,
Formann, 1992 <doi:10.1080/01621459.1992.10475229>.

Alexander Robitzsch

Test Analysis Modules

data.mc function

The dataset is a list with two elements. The entry <code>raw</code>
 contains unscored (raw) item responses and the entry <code>scored</code>
 contains the scored (recoded) item responses. The format is:
<code>List of 2</code> 
<code> $ raw : chr [1:143, 1:30] "A" "A" "A" "A" ...</code> 
<code> ..- attr(*, "dimnames")=List of 2</code> 
<code> .. ..$ : NULL</code> 
<code> .. ..$ : chr [1:30] "I01" "I02" "I03" "I04" ...</code> 
<code> $ scored:'data.frame':</code> 
<code> ..$ I01: num [1:143] 1 1 1 1 1 1 1 1 1 1 ...</code> 
<code> ..$ I02: num [1:143] 1 1 1 0 1 1 1 1 1 1 ...</code> 
<code> ..$ I03: num [1:143] 1 1 1 1 1 1 1 1 1 1 ...</code> 
<code> [...]</code> 
<code> ..$ I29: num [1:143] NA 0 1 0 1 0 0 0 0 0 ...</code> 
<code> ..$ I30: num [1:143] NA NA 1 1 1 1 0 1 1 0 ...</code>

Format

Dataset with Raw and Scored Responses from Multiple Choice Items — data.mc

The dataset is a list with two elements. The entry <code>raw</code>
 contains unscored (raw) item responses and the entry <code>scored</code>
 contains the scored (recoded) item responses. The format is:
<code>List of 2</code> 
<code> $ raw : chr [1:143, 1:30] "A" "A" "A" "A" ...</code> 
<code> ..- attr(*, "dimnames")=List of 2</code> 
<code> .. ..$ : NULL</code> 
<code> .. ..$ : chr [1:30] "I01" "I02" "I03" "I04" ...</code> 
<code> $ scored:'data.frame':</code> 
<code> ..$ I01: num [1:143] 1 1 1 1 1 1 1 1 1 1 ...</code> 
<code> ..$ I02: num [1:143] 1 1 1 0 1 1 1 1 1 1 ...</code> 
<code> ..$ I03: num [1:143] 1 1 1 1 1 1 1 1 1 1 ...</code> 
<code> [...]</code> 
<code> ..$ I29: num [1:143] NA 0 1 0 1 0 0 0 0 0 ...</code> 
<code> ..$ I30: num [1:143] NA NA 1 1 1 1 0 1 1 0 ...</code>

data.mc: Dataset with Raw and Scored Responses from Multiple Choice Items

Description

Usage

Arguments

Format