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kappa_coef()
function to calculate Cohen’s
weighted/unweighted Kappa coefficient.Response
objects prints ‘misc’ fields without an error
when there is a factor type variable.irt:::marginal_reliability(..., method = "empirical")
.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.These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.