mirt: summary-method – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

summary-method

Summary of model object

Description

Transforms coefficients into a standardized factor loading's metric. For MixedClass objects, the fixed and random coefficients are printed. Note that while the output to the console is rounded to three digits, the returned list of objects is not. For simulations, use output <- summary(mod, verbose = FALSE) to suppress the console messages.

Usage

## S4 method for signature 'SingleGroupClass'
summary(
  object,
  rotate = "oblimin",
  Target = NULL,
  suppress = 0,
  verbose = TRUE,
  ...
)

Arguments

`object`	an object of class `SingleGroupClass`, `MultipleGroupClass`, or `MixedClass`
`rotate`	a string indicating which rotation to use for exploratory models, primarily from the `GPArotation` package (see documentation therein). Rotations currently supported are: `'promax'`, `'oblimin'`, `'varimax'`, `'quartimin'`, `'targetT'`, `'targetQ'`, `'pstT'`, `'pstQ'`, `'oblimax'`, `'entropy'`, `'quartimax'`, `'simplimax'`, `'bentlerT'`, `'bentlerQ'`, `'tandemI'`, `'tandemII'`, `'geominT'`, `'geominQ'`, `'cfT'`, `'cfQ'`, `'infomaxT'`, `'infomaxQ'`, `'mccammon'`, `'bifactorT'`, `'bifactorQ'`. For models that are not exploratory this input will automatically be set to `'none'`
`Target`	a dummy variable matrix indicting a target rotation pattern. This is required for rotations such as `'targetT'`, `'targetQ'`, `'pstT'`, and `'pstQ'`
`suppress`	a numeric value indicating which (possibly rotated) factor loadings should be suppressed. Typical values are around .3 in most statistical software. Default is 0 for no suppression
`verbose`	logical; allow information to be printed to the console?
`...`	additional arguments to be passed

References

Chalmers, R., P. (2012). mirt: A Multidimensional Item Response Theory Package for the R Environment. Journal of Statistical Software, 48(6), 1-29. doi: 10.18637/jss.v048.i06

Examples

## Not run: 
x <- mirt(Science, 2)
summary(x)
summary(x, rotate = 'varimax')


## End(Not run)

mirt

Multidimensional Item Response Theory

v1.33.2

GPL (>= 3)

Authors

Phil Chalmers [aut, cre] (<https://orcid.org/0000-0001-5332-2810>), Joshua Pritikin [ctb], Alexander Robitzsch [ctb], Mateusz Zoltak [ctb], KwonHyun Kim [ctb], Carl F. Falk [ctb], Adam Meade [ctb], Lennart Schneider [ctb], David King [ctb], Chen-Wei Liu [ctb], Ogreden Oguzhan [ctb]

Initial release