| ind_gen {DAKS} | R Documentation |
Inductive Generation Procedure
Description
ind_gen generates inductively a set of competing quasi
orders.
Usage
ind_gen(b)
Arguments
b |
a required matrix of the numbers of counterexamples for all
pairs of items, for instance obtained from a call to
|
Value
If the argument b is of required type, ind_gen returns
a list of the inductively generated quasi orders.
Note
The function iita calls ind_gen for
constructing the set of competing quasi orders according to the
inductive generation procedure.
The set of competing quasi orders is a list of objects of the class
set. These objects (quasi orders) consist of
2-tuples (i, j) of the class tuple,
where a 2-tuple (i, j) is interpreted as 'mastering item
j implies mastering item i.'
Author(s)
Anatol Sargin, Ali Uenlue
References
Sargin, A. and Uenlue, A. (2009) Inductive item tree analysis: Corrections, improvements, and comparisons. Mathematical Social Sciences, 58, 376–392.
Schrepp, M. (1999) On the empirical construction of implications between bi-valued test items. Mathematical Social Sciences, 38, 361–375.
Schrepp, M. (2003) A method for the analysis of hierarchical dependencies between items of a questionnaire. Methods of Psychological Research, 19, 43–79.
Uenlue, A. and Sargin, A. (2010) DAKS: An R package for data analysis methods in knowledge space theory. Journal of Statistical Software, 37(2), 1–31. URL http://www.jstatsoft.org/v37/i02/.
See Also
ob_counter for computation of numbers of
counterexamples; iita, the interface that provides the
three inductive item tree analysis methods under one umbrella;
z_test for one- and two-sample Z-tests. See
also DAKS-package for general information about this
package.
Examples
ob <- ob_counter(pisa)
ind_gen(ob)