Summary Method for Objects of Class din
S3 method to summarize objects of the class din.
## S3 method for class 'din' summary(object, top.n.skill.classes=6, overwrite=FALSE, ...)
object |
A required object of class |
top.n.skill.classes |
A numeric, specifying the number of skill classes, starting with the most frequent, to be returned. Default value is 6. |
overwrite |
An optional boolean, specifying wether or not
the method is supposed to overwrite an existing |
... |
Optional parameters to be passed to or from other methods will be ignored. |
The function summary.din returns an object of the class
summary.din (see ‘Value’), for which a
print method, print.summary.din, is
provided. Specific summary information details such as
individual item parameters and their discrimination indices
can be accessed through assignment (see ‘Examples’).
If the argument object is of required type,
summary.din returns a named list, of the class
summary.din, consisting of the following seven components:
CALL |
A character specifying the model rule, the number of items and the number of attributes underlying the items. |
IDI |
A matrix giving the item discrimination index (IDI; Lee, de la Torre & Park, 2012) for each item j IDI_j=1 - s_j - g_j, where a high IDI corresponds to favorable test items which have both low guessing and slipping rates. |
SKILL.CLASSES |
A vector giving the |
AIC |
A numeric giving the AIC of the specified model
|
BIC |
A numeric giving the BIC of the specified model
|
log.file |
A character giving the path and file of a specified log file. |
din.object |
The object of class |
Lee, Y.-S., de la Torre, J., & Park, Y. S. (2012). Relationships between cognitive diagnosis, CTT, and IRT indices: An empirical investigation. Asia Pacific Educational Research, 13, 333-345.
Rupp, A. A., Templin, J. L., & Henson, R. A. (2010) Diagnostic Measurement: Theory, Methods, and Applications. New York: The Guilford Press.
plot.din, the S3 method for plotting objects of
the class din; print.din, the S3 method
for printing objects of the class din;
summary.din, the S3 method for summarizing objects
of the class din, which creates objects of the class
summary.din; din, the main function for
DINA and DINO parameter estimation, which creates objects of the class
din. See also CDM-package for general
information about this package.
##
## (1) examples based on dataset fractions.subtraction.data
##
## Parameter estimation of DINA model
# rule="DINA" is default
fractions.dina <- CDM::din(data=CDM::fraction.subtraction.data,
q.matrix=CDM::fraction.subtraction.qmatrix, rule="DINA")
## corresponding summaries, including diagnostic accuracies,
## most frequent skill classes and information
## criteria AIC and BIC
summary(fractions.dina)
## In particular, accessing detailed summary through assignment
detailed.summary.fs <- summary(fractions.dina)
str(detailed.summary.fs)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.