Nothing
title = NULL
. item_analysis()
function now has a new argument stats
where only selected
item analysis statistics can be calculated. item_analysis()
function can now calculate pval_unadj
which is simply the
mean of item scores. pval
is still the mean of item scores divided by each
item's maximum possible score. area_between_icc()
function to calculate the area between two item
characteristic curves of two unidimensional dichotomous items. The function
can calculate either exact area (except when 3PL with different
pseudo-guessing parameters) or area between two theta values. cat_sim()
function can use MAP (maximum-a-posteriori or Bayes Modal) and
MAP + ML (i.e. MAP until an imperfect response string and ML after) ability
estimation methods. $.cat_output
". output_type
argument to est_ability(, output_type = )
function with
available following output types: "list"
, "data.frame"
, "tibble"
.
Previously, the output was only a "list".Itempool
object with one testlet can be printed without an
error.$item_ids
to testlet object to get the ids of the items within the
testlet. plot_empirical_icc()
function. $max_score
for Testlet
objects. For a given Testlet
object t1
,
t1$max_score
returns the maximum obtainable score by all items within
the testlet. $resp_item_list
for Itempool
objects. For an Itempool
object
ip
, ip$resp_item_list
will combine items that are not in a testlet and
items within a testlet and returns a list object that is composed of only
Item
objects. est_bilog()
function to estimate item parameters for "1PL", "2PL" and
"3PL" models using BILOG-MG on computers with Windows OS. This function
requires an installed BILOG-MG program on the machine. Any scripts or data that you put into this service are public.
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