FMP                     Estimate the coefficients of a filtered
                        monotonic polynomial IRT model
FMPMonotonicityCheck    Utility function for checking FMP monotonicity
FUP                     Estimate the coefficients of a filtered
                        unconstrained polynomial IRT model
eap                     Compute eap trait estimates for FMP and FUP
                        models
erf                     Utility fnc to compute the components for an
                        empirical response function
gen4PMData              Generate item response data for 1, 2, 3, or
                        4-parameter IRT models
genFMPData              Generate item response data for a filtered
                        monotonic polynomial IRT model
irf                     Plot item response functions for polynomial IRT
                        models.
restScore               Plot an ERF using rest scores
svdNorm                 Compute theta surrogates via normalized SVD
                        scores
