Functions for imputing missing item responses for dichotomous and
polytomous test and assessment data. This package enables missing imputation
methods that are suitable for test and assessment data, including:
listwise (LW) deletion (see De Ayala et al. 2001 <doi:10.1111/j.1745-3984.2001.tb01124.x>),
treating as incorrect (IN, see Lord, 1974 <doi: 10.1111/j.1745-3984.1974.tb00996.x>;
Mislevy & Wu, 1996 <doi: 10.1002/j.2333-8504.1996.tb01708.x>;
Pohl et al., 2014 <doi: 10.1177/0013164413504926>), person mean imputation (PM),
item mean imputation (IM), two-way (TW) and response function (RF) imputation,
(see Sijtsma & van der Ark, 2003 <doi: 10.1207/s15327906mbr3804_4>),
logistic regression (LR) imputation, predictive mean matching (PMM), and expectation–maximization (EM)
imputation (see Finch, 2008 <doi: 10.1111/j.1745-3984.2008.00062.x>).

Optimal Test Design Approach to Fixed and Adaptive Test
Construction
c(
person("Seung W.", "Choi", email = "schoi@austin.utexas.edu", role = c("aut", "cre")),
person("Sangdon", "Lim", email = "sangdonlim@utexas.edu", role = "aut"))
Use the optimal test design approach by Birnbaum (1968, ISBN:9781593119348) and
van der Linden (2018) <doi:10.1201/9781315117430> in constructing fixed and adaptive tests. Supports the following
mixed-integer programming (MIP) solver packages: 'Rsymphony', 'gurobi', 'lpSolve', and 'Rglpk'. The 'gurobi' package
is not available from CRAN; see <https://www.gurobi.com/downloads>. See vignette for installing 'Rsymphony' package
on Mac systems.
Rcpp (>= 1.0.0), methods, Matrix, lpSolve, foreach, logitnorm,
Rdpack, crayon
gurobi, Rsymphony, Rglpk, shiny, shinythemes, shinyWidgets,
shinyjs, DT, knitr, rmarkdown, testthat (>= 2.1.0)
'import.R' 'RcppExports.R' 'item_class.R' 'item_functions.R'
'loading_functions.R' 'ATA_class.R' 'ATA_functions.R'
'solver_functions.R' 'shadow_class.R' 'shadow_functions.R'
'datasets.R' 'runshiny.R'
Seung W. Choi [aut, cre],
Sangdon Lim [aut]

gurobi, Rsymphony, Rglpk, shiny, shinythemes, shinyWidgets,
shinyjs, DT, knitr, rmarkdown, kableExtra, testthat (>= 2.1.0)