• scd.exe: scd.exe
• scd.zip: scd.zip

Introduction to DIGRAM, Copenhagen 2023

Date	Time	Room	Topics	pdf
Monday, February 13th	10-12	CSS, room 5.0.22	Introduction to DIGRAM with focus on intentions of the implementation and an overview of things that may be hard to find elsewhere: e.g. analysis of ordinal categorical data by graphical model and item analysis by graphical and log-linear Rasch models.	Monday lecture.pdf
Tuesday, February 14th	10-12	CSS, room 5.0.22	Graphical models in DIGRAM. An example.	Tuesday lecture.pdf
Wednesday, February 15th	10-12	CSS, room 5.0.22	Item analysis by graphical Rasch models. Testing model fit using conditional inference.	Wednesday lecture.pdf
Thursday, February 16th	10-12	CSS, room 5.0.22	Interaction tests in graphical Rasch models. Testing differential item functioning (DIF) and local dependence (LD). Item analysis by log-linear Rasch models where items may function differentially and/or to be locally dependent. Since DIF and LD occurs in many health related scales, log-linear Rasch models provide an important extension.	Thursday lecture.pdf
Friday, February 13th	10-12	CSS, room 5.0.22	Person fit revisited. Exact tests of person fit in log-linear Rasch models. Tests of unidimensionality and other loose ends. Exact tests of person fit uses conditional probabilities of response patterns as test statistics based on Martin-Löf (Scand J Statist, vol. 1, 3-18, 1974).	Friday lecture.pdf

Exercises. Introduction to DIGRAM, Copenhagen 2023

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BIRT - exercises.pdf
BIRT - Supplemental material.pdf
BIRT Data.csv
Pellicciari 2020 - BIRT Rasch Analysis.pdf

• Introduction to DIGRAM.pdf


• Item analysis in DIGRAM 5-01 - guided tours.pdf


• Analysis of contingency tables by chain graph models


• Overview of DIGRAM commands


• Project management


• The graph module

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Graphical models:

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Kreiner, S. (1986). Computerized Exploratory Screening of Large-Dimensional Contingency Tables (F. Deantoni, N. C. Lauro, & A. Rizzi, Eds.; pp. 43–48). Physica-Verlag.

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Kreiner, S. (1987). Analysis of Multidimensional Contingency Tables by Exact Conditional Tests: Techniques and Strategies. Scandinavian Journal of Statistics, 14(2), 97–112. http://www.jstor.org/stable/4616054

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Kreiner, S. (1989). Statistical analysis of complex health and social data. Social Science & Medicine, 29(2), 253–258. https://doi.org/10.1016/0277-9536(89)90174-3

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Klein, J. P., Keiding, N., & Kreiner, S. (1995). Graphical models for panel studies, illustrated on data from the framingham heart study. Statistics in Medicine, 14(12), 1265–1290. doi:10.1002/sim.4780141202

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Kreiner. An informal introduction to graphical modelling. In: Sartorius, Knudsen, Thornicroft (Eds.), Mental Health Service Evaluation (Studies in Social and Community Psychiatry. Cambridge: Cambridge University Press; 1996:156-175. doi:10.1017/CBO9780511752650.012
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Kreiner, S. (2005). Interaction Model. In Encyclopedia of Biostatistics. Wiley. https://doi.org/10.1002/0470011815.b2a10026

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Kreiner, S., Petersen, J. H., & Siersma, V. (2009). Deriving and testing hypotheses in chain graph models (Issue 9).

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Graphical Rasch models:

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Kreiner S, Christensen KB. Graphical Rasch Models. In: Mesbah, Cole, Lee (Eds.) Statistical Methods for Quality of Life Studies. Boston, MA: Springer US; 2002:187-203.
doi:10.1007/978-1-4757-3625-0_15
Kreiner. Validity and objectivity: Reflections on the role and nature of Rasch models, Nordic Psychology, vol. 59, 268-298, 2007.
doi:10.1027/1901-2276.59.3.268
Kreiner, Christensen. Communications in Statistics, Theory and Methods, vol. 33, 1239-€“1276, 2004.
doi:10.1081/STA-120030148
Kreiner, Christensen. Validity and Objectivity in Health-Related Scales Analysis by Graphical Loglinear Rasch Models. In: Multivariate and Mixture Distribution Rasch Models. New York, NY: Springer New York; 2007:329-346.
doi:10.1007/978-0-387-49839-3_21
Kreiner, Christensen. Psychometrika, 79, 210-231, 2014.
doi:10.1007/s11336-013-9347-z
http://rdcu.be/mRkq
Kreiner, Christensen. Psychometrika, 76, 228-256, 2011.
doi:10.1007/s11336-011-9203-y
http://rdcu.be/mRi6