ShinyItemAnalysis: Test and Item Analysis via Shiny

#' Key of correct answers for homeostasis concept inventory dataset
#'
#' @description The \code{HCIkey} is a vector of factors representing correct
#'   answers of \code{HCItest} dataset.
#'
#' @usage data(HCIkey)
#'
#' @author Jenny L. McFarland \cr Biology Department, Edmonds Community College
#'
#' @references McFarland, J. L., Price, R. M., Wenderoth, M. P., Martinkova, P.,
#' Cliff, W., Michael, J., ... & Wright, A. (2017). Development and validation
#' of the homeostasis concept inventory. CBE-Life Sciences Education, 16(2),
#' ar35. \doi{10.1187/cbe.16-10-0305}
#'
#' @keywords datasets
#'
#' @seealso
#' \code{\link{HCItest}} for HCI multiple-choice dataset\cr
#' \code{\link{HCI}} for HCI dichotomous dataset\cr
#' \code{\link{HCIdata}} for HCI full dataset\cr
#' \code{\link{HCIgrads}}  for HCI dataset of graduate students\cr
#' \code{\link{HCIprepost}} for HCI pretest and posttest scores\cr
#' \code{\link{HCItestretest}} for HCI test-retest dataset
#'
#' @format A nominal vector with 20 values representing correct answers to items
#'   of \code{HCItest} dataset. For more details see \code{\link{HCItest}}.
"HCIkey"