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man/pcm.Rd

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+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/pcm.R
+\name{pcm}
+\alias{pcm}
+\title{Compute Partial Credit Model (PCM) for polytomous and dichotomous items}
+\usage{
+pcm(
+  df = NULL,
+  items = NULL,
+  grp = NULL,
+  dif.items = NULL,
+  type.dif = NULL,
+  verbose = T,
+  fit = "ucminf"
+)
+}
+\arguments{
+\item{df}{data.frame containing the data}
+
+\item{items}{vector containing the names of columns where item responses are stored in df}
+
+\item{grp}{string containing the name of the column where an optional group membership variable is stored in df}
+
+\item{dif.items}{vector containing the list of indexes in "items" corresponding to dif items}
+
+\item{type.dif}{vector containing DIF form for each item specified in dif.items. 1 is homogeneous DIF, 0 is heterogeneous DIF}
+}
+\value{
+A data.frame containing various model outputs
+}
+\description{
+This function computes a frequentist PCM, potentially accounting for DIF on specified items
+}