rpf (version 0.5)

EAPscores: Compute EAP scores

Description

If you have missing data then you must specify minItemsPerScore. This option will set scores to NA when there are too few items to make an accurate score estimate. If you are using the scores as point estimates without considering the standard error then you should set minItemsPerScore as high as you can tolerate. This will increase the amount of missing data but scores will be more accurate. If you are carefully considering the standard errors of the scores then you can set minItemsPerScore to 1. This will mimic the behavior of most other IFA software wherein scores are estimated if there is at least 1 non-NA item for the score. However, it may make more sense to set minItemsPerScore to 0. When set to 0, all NA rows are scored to the prior distribution.

Usage

EAPscores(grp, ..., naAction = NULL, compressed = FALSE)

Arguments

grp

a list with spec, param, data, and minItemsPerScore

...

Not used. Forces remaining arguments to be specified by name.

naAction

deprecated, will be removed in the next release

compressed

output one score per observed data row even when weightColumn is set (default FALSE)

Examples

spec <- list()
spec[1:3] <- rpf.grm(outcomes=3)
param <- sapply(spec, rpf.rparam)
data <- rpf.sample(5, spec, param)
colnames(param) <- colnames(data)
grp <- list(spec=spec, param=param, data=data, minItemsPerScore=1L)
EAPscores(grp)