data.pisaPars: Item Parameters from Two PISA Studies

Description Usage Format

Description

This data frame contains item parameters from two PISA studies. Because the Rasch model is used, only item difficulties are considered.

Usage

1

Format

A data frame with 25 observations on the following 4 variables.

item

Item names

testlet

Items are arranged in corresonding testlets. These names are located in this column.

study1

Item difficulties of study 1

study2

Item difficulties of study 2



Search within the sirt package
Search all R packages, documentation and source code

Questions? Problems? Suggestions? or email at ian@mutexlabs.com.

Please suggest features or report bugs with the GitHub issue tracker.

All documentation is copyright its authors; we didn't write any of that.