ltm-package |
Latent Trait Models for Item Response Theory Analyses |
Abortion |
Attitude Towards Abortion |
anova.gpcm |
Anova method for fitted IRT models |
anova.grm |
Anova method for fitted IRT models |
anova.ltm |
Anova method for fitted IRT models |
anova.rasch |
Anova method for fitted IRT models |
anova.tpm |
Anova method for fitted IRT models |
biserial.cor |
Point-Biserial Correlation |
coef.gpcm |
Extract Estimated Loadings |
coef.grm |
Extract Estimated Loadings |
coef.ltm |
Extract Estimated Loadings |
coef.rasch |
Extract Estimated Loadings |
coef.tpm |
Extract Estimated Loadings |
cronbach.alpha |
Cronbach's alpha |
descript |
Descriptive Statistics |
Environment |
Attitude to the Environment |
factor.scores |
Factor Scores - Ability Estimates |
factor.scores.gpcm |
Factor Scores - Ability Estimates |
factor.scores.grm |
Factor Scores - Ability Estimates |
factor.scores.ltm |
Factor Scores - Ability Estimates |
factor.scores.rasch |
Factor Scores - Ability Estimates |
factor.scores.tpm |
Factor Scores - Ability Estimates |
fitted.gpcm |
Fitted Values for IRT model |
fitted.grm |
Fitted Values for IRT model |
fitted.ltm |
Fitted Values for IRT model |
fitted.rasch |
Fitted Values for IRT model |
fitted.tpm |
Fitted Values for IRT model |
gh |
Gauss-Hermite Quadrature Points |
GoF.gpcm |
Goodness of Fit for Rasch Models |
GoF.rasch |
Goodness of Fit for Rasch Models |
gpcm |
Generalized Partial Credit Model - Polytomous IRT |
grm |
Graded Response Model - Polytomous IRT |
information |
Area under the Test or Item Information Curves |
item.fit |
Item-Fit Statistics and P-values |
LSAT |
The Law School Admission Test (LSAT), Section VI |
ltm |
Latent Trait Model - Latent Variable Model for Binary Data |
margins |
Fit of the model on the margins |
margins.gpcm |
Fit of the model on the margins |
margins.grm |
Fit of the model on the margins |
margins.ltm |
Fit of the model on the margins |
margins.rasch |
Fit of the model on the margins |
margins.tpm |
Fit of the model on the margins |
Mobility |
Women's Mobility |
mult.choice |
Multiple Choice Items to Binary Responses |
person.fit |
Person-Fit Statistics and P-values |
plot.descript |
Descriptive Statistics Plot method |
plot.fscores |
Factor Scores - Ability Estimates Plot method |
plot.gpcm |
Plot method for fitted IRT models |
plot.grm |
Plot method for fitted IRT models |
plot.ltm |
Plot method for fitted IRT models |
plot.rasch |
Plot method for fitted IRT models |
plot.tpm |
Plot method for fitted IRT models |
rasch |
Rasch Model |
rcor.test |
Pairwise Associations between Items using a Correlation Coefficient |
residuals.gpcm |
Residuals for IRT models |
residuals.grm |
Residuals for IRT models |
residuals.ltm |
Residuals for IRT models |
residuals.rasch |
Residuals for IRT models |
residuals.tpm |
Residuals for IRT models |
rmvlogis |
Generate Random Responses Patterns under Dichotomous and Polytomous IRT models |
rmvordlogis |
Generate Random Responses Patterns under Dichotomous and Polytomous IRT models |
Science |
Attitude to Science and Technology |
summary.gpcm |
Summary method for fitted IRT models |
summary.grm |
Summary method for fitted IRT models |
summary.ltm |
Summary method for fitted IRT models |
summary.rasch |
Summary method for fitted IRT models |
summary.tpm |
Summary method for fitted IRT models |
testEquatingData |
Prepares Data for Test Equating |
tpm |
Birnbaum's Three Parameter Model |
unidimTest |
Unidimensionality Check using Modified Parallel Analysis |
vcov.gpcm |
vcov method for fitted IRT models |
vcov.grm |
vcov method for fitted IRT models |
vcov.ltm |
vcov method for fitted IRT models |
vcov.rasch |
vcov method for fitted IRT models |
vcov.tpm |
vcov method for fitted IRT models |
WIRS |
Workplace Industrial Relation Survey Data |