Svend Kreiner

Associate professor, Department of Biostatistics, University of Copenhagen.

Courses (in Danish)

Research interests:

Analysis of categorical data.

I have worked with several topics under this heading. Particular interests are

• Rasch models and other item response models.
• Graphical models for ordinal categorical data.
• Analysis of repeated ordinal measurements.

Publications

SCD and DIGRAM

Most of my work on analysis of ordinal categorical data has been implemented in a program, SCD, for statistical analysis of categorical data. DIGRAM started life (too many years ago) as a series of stand alone programs. An early version collecting procedures for analysis of high-dimensional contingency tables by Discrete Graphical Models was called DIGRAM. DIGRAM has since then been included in the larger SCD package now supporting:

• Analysis by graphical models.
• Analysis by graphical and loglinear Rasch models.
• Analysis by multi-dimensional Markov chain models.
• Analysis of marginal and conditional homogeneity of repeated ordinal measurements.
• Analysis of collapsibility of categories in multidimensional contingency tables by stepwise multiple comparison analysis.
• Non-parametric analysis of ordinal data by loglinear models.

A ZIP file with the version 1.84 of the program, the user guide and some examples may be downloaded here: digram.zip. Use the “SHOW N” command if you want to see what has happened to the program, since the publication of the user guide in 2003.