Displaying 3 results from an estimated 3 matches for "testequatingdata".
2011 Aug 12
0
testEquatingData (part of ltm package) changes order of columns
Dear R community,
I hope someone is out there who has some insights into the ltm package.
Specifically, I am seeking help for the testEquatingData function which is
part of this package.
Here is an example of my data:
#install.packages("ltm", dependencies = TRUE)
library(ltm)
anchor<- as.data.frame(cbind(c(NA, NA, NA, NA, 1), c(NA, NA, NA, 1, NA),
c(1,1,NA,NA,NA)))
names(anchor) <- c("A1","A2", "A3&...
2007 May 08
0
package ltm -- version 0.8-0
...s for dichotomous data.
The `simulate.p.value' argument enables the computation of p-values
based on a Monte Carlo procedure.
* The new function unidimTest() checks the unidimensionality
assumption for dichotomous data IRT models, using a Modified Parallel
Analysis.
* The new function testEquatingData() prepares data-sets for test
equating by common items. In particular, two types of common item
equating are included: alternate form equating (where common and
unique items are analyzed simultaneously) and across sample equating
(where different sets of unique items are analyzed separately bas...
2007 May 08
0
package ltm -- version 0.8-0
...s for dichotomous data.
The `simulate.p.value' argument enables the computation of p-values
based on a Monte Carlo procedure.
* The new function unidimTest() checks the unidimensionality
assumption for dichotomous data IRT models, using a Modified Parallel
Analysis.
* The new function testEquatingData() prepares data-sets for test
equating by common items. In particular, two types of common item
equating are included: alternate form equating (where common and
unique items are analyzed simultaneously) and across sample equating
(where different sets of unique items are analyzed separately bas...