rpf.mean.info: Find the point where an item provides mean maximum information
Description
This is a point estimate of the mean difficulty of items
that do not offer easily interpretable parameters such as
the Generalized PCM. Since the information curve may not
be unimodal, this function integrates across the latent
space.
Usage
rpf.mean.info(spec, param, grain = 0.1)
Arguments
spec
list of item specs
param
list or matrix of item parameters
grain
the step size for numerical integration
(optional)