birtms: Creates and analyses Bayesian IRT models

#' Evaluated answers for 499 persons of the SPM-LS
#'
#' A dataset containing the binary evaluated answers of 499 persons to the 12 hardest items of the SPM-LS collected by Myszkowski and Storme (2018).
#'
#' @format A data frame with 499 rows and 13 variables:
#' \describe{
#'   \item{person}{person id}
#'   \item{i1}{answers to item 1}
#'   \item{i2}{answers to item 2}
#'   \item{i3}{answers to item 3}
#'   \item{i4}{answers to item 4}
#'   \item{i5}{answers to item 5}
#'   \item{i6}{answers to item 6}
#'   \item{i7}{answers to item 7}
#'   \item{i8}{answers to item 8}
#'   \item{i9}{answers to item 9}
#'   \item{i10}{answers to item 10}
#'   \item{i11}{answers to item 11}
#'   \item{i12}{answers to item 12}
#'   ...
#' }
#' @source \url{https://data.mendeley.com/datasets/h3yhs5gy3w/1}
"data_spm"