equateIRT

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 access the stability of the equating transformations (Battauz(2022) doi:10.1111/stan.12277).