mokken (version 2.4)

summary.pmatrix.class: Summarize pmatrix.class objects

Description

S3 Method for summary of objects of class pmatrix.class. Summarize checks of nonintersection using method pmatrix.

Usage

## S3 method for class 'pmatrix.class':
summary(object, ...)

Arguments

object

list produced by check.pmatrix

...

Optional parameters will be ignored

Value

• ppp.summary.matrix
  Matrix with ncol(X) rows and 7 columns, showing for each item a summary of the violations in the P(++) matrix.
• pmm.summary.matrix
  Matrix with ncol(X) rows and 7 columns, showing for each item a summary of the violations in the P(--) matrix.

References

Mokken, R. J. (1971) A Theory and Procedure of Scale Analysis. Berlin, Germany: De Gruyter. Molenaar, I.W. and Sijtsma, K. (2000) User's Manual MSP5 for Windows [Software manual]. Groningen, The Netherlands: IEC ProGAMMA. Sijtsma, K, and Molenaar, I. W. (2002) Introduction to nonparametric item response theory. Thousand Oaks, CA: Sage. Van der Ark, L. A. (2007). Mokken scale analysis in R. Journal of Statistical Software. http://www.jstatsoft.org

See Also

check.pmatrix, plot.pmatrix.class

Examples

data(acl)
Communality <- acl[,1:10]
pmatrix.list <- check.pmatrix(Communality)
plot(pmatrix.list)
summary(pmatrix.list)