refitDIFlasso: Refit function for DIFlasso

In masko-p/DIFlasso: A penalty approach to Differential Item Functioning in Rasch Models

Description

Performs the refit of a DIFlasso object. Only the items diagosed as DIF items will be used to perform a new fit of the final model.

Usage

refitDIFlasso(dif.obj)

Arguments

dif.obj

DIFlasso object, created by DIFlasso

Value

theta	Estimated person abilities after refit
beta	Estimated item difficulties after refit
gamma	Estimated item-specific parameters after refit; one row per covariate, one column per item
P	Number of persons
I	Number of items
m	Number of covariates
ref.item	Reference item
dif.items	Which items have been detected to be DIF items?
names.y	Names of the items
names.x	Names of the covariates

Author(s)

Gunther Schauberger
[e-mail]
http://www.statistik.lmu.de/~schauberger/

References

Tutz, Gerhard and Schauberger, Gunther (2013): A Penalty Approach to Differential Item Functioning in Rasch Models, Technical Report 134, Department of Statistics, LMU Munich

See Also

print.DIFlasso.refit, plot.DIFlasso.refit, DIFlasso

Examples

## Not run: 
data(simul.data)

Y <- simul.data[,1:10]
X <- simul.data[,11:13]

m1 <- DIFlasso(Y = Y, X = X, trace = TRUE) 
print(m1)
plot(m1)

m2 <- refitDIFlasso(m1)
print(m2)
plot(m2)

## End(Not run)

masko-p/DIFlasso documentation built on May 21, 2019, 12:42 p.m.