Additional file 3.

Sample P&P and CAT Item Parameters. This file contains 4 columns of item parameters for 100 items. Columns 1 and 2 are the estimated discrimination and difficulty parameters for the P&P version of the instrument, respectively. Columns 3 and 4 are the discrimination and difficulty parameters used to generate the item responses for subsequent use in the CAT simulation.

Format: XLS Size: 22KB Download file

This file can be viewed with: Microsoft Excel Viewer

Riley and Carle BMC Medical Research Methodology 2012 12:124   doi:10.1186/1471-2288-12-124