The book, originally a PhD Thesis (Department of Psychometrics and Research Methodology, Leiden University; supervisors: Prof. dr. J.M.F. ten Berge and Prof. L.J.Th. van der Kamp), is now freely available in PDF-format, which can be read with Adobe Acrobat Reader or GhostView. A single PDF file of the entire book is available here as well as the individual chapters.
Please note that the DSWO Press no longer exists, so that this website is the primary source for this book. However a number of real copies of the book are still be available from the author Jacques Commandeur.
Institute of Education and Child Studies, Leiden University
Wassenaarseweg 52, 2333 AK Leiden, The Netherlands
Tel. *-31-71-5273446/5273434 (secr.); fax *-31-71-5273945
E-mail: kroonenb at fsw.leidenuniv.nl