check.restscore {mokken} | R Documentation |
Returns a list with results from the investigation of nonintersection using method restscore.
check.restscore(X, minvi = 0.03, minsize = default.minsize)
X |
matrix or data frame of numeric data
containing the responses of nrow(X) respondents to ncol(X) items.
Missing values are not allowed |
minvi |
minimum size of a violation that is reported |
minsize |
minimum size of a rest score group. By default
minsize = N/10 if N >=q 500;
minsize = N/5 if 250 <=q N < 500; and
minsize = max(N/3,50) if N < 250 |
The output is often numerous.
Procedure may be slow for large data sets.
Functions plot
and summary
can be used to summarize the output.
See Van der Ark (2007) for an example.
results |
A list with as many components as there are items. Each component itself is also a list containing the results of the check of nonintersection using method restscore. |
I.labels |
The item labels |
Hi |
The item scalability coefficients |
m |
The number of answer categories. |
L. A. van der Ark a.vdark@uvt.nl
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
coefH
, check.monotonicity
, check.pmatrix
,
plot.restscore.class
, summary.restscore.class
data(acl) Communality <- acl[,1:10] restscore.list <- check.restscore(Communality) plot(restscore.list) summary(restscore.list)