Description Usage Format References Examples
Simulated data set with 100 persons, 10 items and 3 (standardized) covariates. Items 1, 2 and 3 are DIF items.
1 |
Item1
Item 1, DIF item
Item2
Item 2, DIF item
Item3
Item 3, DIF item
Item4
Item 4, non-DIF item
Item5
Item 5, non-DIF item
Item6
Item 6, non-DIF item
Item7
Item 7, non-DIF item
Item8
Item 8, non-DIF item
Item9
Item 9, non-DIF item
Item10
Item 10, non-DIF item
CovBin1
Binary covariate (standardized)
CovBin2
Binary covariate (standardized)
CovMet
Metric covariate (standardized)
Tutz, Gerhard and Schauberger, Gunther (2015): A Penalty Approach to Differential Item Functioning in Rasch Models, Psychometrika, 80(1), 21 - 43
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | ## 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)
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