IRT Equating Methods
IRT Equating Methods
Direct Equating Coefficients Between All Pairs of a List of Forms
Bisector Equating Coefficients
Chain Equating Coefficients
Item Parameters Conversion
DIF Test
Direct Equating Coefficients
Extract Equating Coefficients
Identity Test
Import Item Parameters Estimates and Covariance Matrices from IRT Soft...
Extract Item Parameters
Linkage Plan
Estimated Coefficients and Covariance Matrix of IRT Models
Scoring
Test on Chain Equating Coefficients
Summarizing Estimated Chain Equating Coefficients
Summarizing a List of Estimated Chain Equating Coefficients
Summarizing Estimated Equating Coefficients
Summarizing a List of Estimated Direct Equating Coefficients
Summarizing Bisector Equating Coefficients
Computation of direct, chain and average (bisector) equating coefficients with standard errors using Item Response Theory (IRT) methods for dichotomous items (Battauz (2013) <doi:10.1007/s11336-012-9316-y>, Battauz (2015) <doi:10.18637/jss.v068.i07>). Test scoring can be performed by true score equating and observed score equating methods. DIF detection can be performed using a Wald-type test (Battauz (2019) <doi:10.1007/s10260-018-00442-w>). The package includes tests to assess the stability of the equating transformations (Battauz(2022) <doi:10.1111/stan.12277>).