Description Usage Arguments Details Value Author(s) References See Also Examples
This function calculates the lower bound to the Lindley information (i.e., information utility) given a Jeffreys prior normalizing constant or ltm object.
1 | iota.l(x)
|
x |
Either an ltm object or a Jeffreys prior normalizing constant. |
This function calculates the lower bound to the Lindley information (i.e., information utility) given a Jeffreys prior normalizing constant or ltm object.
x
can be an object from the ltm package describing a set of IRT parameters (e.g., as returned by ltm
, grm
, or gpcm
).
If x
is a vector, the function will return a vector of lower bounds.
A lower bound to the Lindley information, or a vector of lower bounds for different sets of items.
Kristian E. Markon
Markon, K. E. (2013). Information utility: Quantifying the total psychometric information provided by a measure. Psychological Methods, 18, 15-35. doi: 10.1037/a0030638..
Jeffreys
, iota.c
, nmru
, iota
, ltm
, grm
, gpcm
1 2 3 4 |
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