Elementary analysis of the items in a test and the test
sumscores based on Classical Test Theory.
Usage
tia(choices, key, ...)
Arguments
choices
The original responses to the items in the
test: persons as rows, items as columns. May contain NA.
key
A vector containing the key (correct answers)
to the items in choices. If not given, the
function will check if all data are either 0, 1, or NA:
if yes, NA are recoded as 0, else an error message is
returned.
...
Other parameters that may be passed to
sco or cov
Value
A list with three elements: [object Object],[object Object],[object Object]