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Log-likelihood function used in the Maximization Step (M-Step).

Source: R/04C_ParameterEstimation.R
objective_function_IRT.Rd

Log-likelihood function used in the Maximization Step (M-Step).

Usage

objective_function_IRT(lambda, model, qjtrue, qjfalse, quadrature)

Arguments

lambda

item parameter vector

model

2,3,or 4 PL

qjtrue

correct resp pattern

qjfalse

incorrect resp pattern

quadrature

Pattern of a segmented normal distribution.