These functions extract information from an object of class
typically created using
plink, or an object of
irt.prob containing expected probabilities.
1 2 3 4
character vector identifying the linking methods for which
constants should be returned. The only acceptable values are
link.con extracts the linking constants,
link.pars extracts the rescaled item parameters (if present), and
link.ability extracts the rescaled ability estimates (if present)
get.prob extracts expected probabilities for an
link.con, the following values can be included for
For multidimensional constants, although matrices
included in the object of class "
link" for the Haebara and Stocking-Lord
methods, only the matrix
A will be returned for these methods.
Returns the constants for all linking methods
Reckase-Martineau (for multidimensional constants only)
Returns a matrix or list of linking constants
Jonathan P. Weeks email@example.com
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