The full manual of EL Version １.0 User’s guide (pdf/Word files of 34 pages) is available.  The source codes written in Fortran90 (a self-decompressing file) will be obtained upon request to the author by e-mail.  It is convenient to decompress the file in a special file folder since you will have 10 files.  The following are the contents of the manual.

 

 

 

EL Version 1.0 User’s guide

 

A set of subroutines for the methods of item response theory (IRT)

Equating/Linking with their asymptotic standard errors

 

by

Haruhiko Ogasawara

May, 2003

 

© H. Ogasawara

Otaru University of Commerce, 3-5-21 Midori, Otaru 047-8501 Japan

Email:  hogasa@res.otaru-uc.ac.jp

 

Contents

1. General notes

 

2. Item parameter estimation

2.1 NRM1: Generation of quadrature points

2.2 ELPEV1: Item parameter estimation by the marginal maximum likelihood method

 

3. ELV1: IRT equating and linking with their asymptotic standard errors

 

4. An example

4.1 Data

4.2 Usage

4.3 Results

 

Appendix 1. Technical subroutines

Appendix 2. An example of extended problem size

 

References