est: Obtain an ability estimate given a response pattern and item...

In Karel-Kroeze/MCAT: What the package does (short line)

Description

Calculates either the maximum likelihood (ML), estimated a-posteriori (EAP) or Bayes modal (BM or MAP) estimate.

Usage

est(theta, items, resp, method = "BM", model = items$model,
  prior = items$covar, threshold = 1e-04, max.iter = 10, debug = FALSE,
  ip = 10, ...)

Arguments

theta	Numeric (vector), initial theta estimate. Defaults to a null vector of length equal to the number of dimensions.
items	Subset of itembank that has been answered, see genItembank.
resp	Response pattern, see ans.
method	String, valid values are "ML", "EAP", and "MAP" or "BM". Defaults to "BM".
model	String, valid values are "3PL", "GRM", "SM" or "GPCM". Defaults to "GPCM".
debug	Logical. Should debug information be shown?
...	Passed on to eapEst, ignored if method is not "EAP". See eapEst for details.
Sigma0	Numeric (matrix), prior covariance. Only required when method != "ML".

Details

Details

Value

list with two entries; theta contains the current theta estimate, and SE the standard error of the estimate.

Karel-Kroeze/MCAT documentation built on May 8, 2019, 4:50 p.m.