Prof. Dr. Christof Schuster

Fachbereich 06 Psychologie und Sportwissenschaft
Justus-Liebig-Universität Giessen
Otto-Behaghel-Str. 10
D-35394 Giessen

Sprechstunde: Fr 8:00 - 9:00 Uhr (in den Semesterferien nur am: 20.8, 24.9 und 8.10)

Bio-Sketch

Jahrgang 1963; 1992 Diplom im Fach Psychologie an der Technischen Universität Berlin; 1993-1995 Biometriker am Institut für Toxikologie der Freien Universität Berlin; 1995-1997 wissenschaftlicher Mitarbeiter am Institut für Psychologie der Friedrich-Schiller-Universität Jena; 1997 Promotion zum Dr. phil. an der Technischen Universität Berlin; 1997-1999 Research Investigator (post-doc) am Survey Research Center des Institute for Social Research der University of Michigan in Ann Arbor, Michigan; 1999-2004 Assistant Professor im Department of Psychology der University of Notre Dame in South Bend, Indiana; seit 2004 Inhaber der Professur für Psychologische Methodenlehre am Fachbereich Psychologie und Sportwissenschaft der Justus-Liebig-Universität Giessen.

Research

My primary research area is the development of statistics and statistical models with which the quality of psychological measures can be assessed. In particular, I am focusing on latent class models and other mixture models that are useful for determining the degree to which two or more raters agree when classifying targets into nominal or ordinal categories.

Selected Publications

• Schuster, C. & Smith, D. A. (2006). Estimating with a latent class model the reliability of nominal judgments upon which two raters agree. Educational and Psychological Measurement, 66(5), 739-747.
• Schuster, C. & Smith, D. A. (2005). Dispersion weighted Kappa: An integrative framework for metric and nominal scale agreement coefficients. Psychometrika, 70(1), 135-146.
• Schuster, C. (2004). A note on the interpretation of weighted kappa and its relations to other rater agreement statistics for metric scales. Educational and Psychological Measurement, 64(2), 243-253.
• Schuster, C. (2002). A mixture model approach to indexing rater agreement. British Journal of Mathematical and Statistical Psychology, 55(2), 289-303.
• Schuster, C. & Smith, D. A. (2002). Indexing systematic rater agreement with a latent class model. Psychological Methods, 7(3), 384-395. 
• Schuster, C. (2001). Kappa as a parameter of a symmetry model for rater agreement. Journal of Educational and Behavioral Statistics, 26(3), 331-342. 
• Schuster, C. & von Eye, A. (2001). Modeling ordinal agreement data. Biometrical Journal, 43(7), 795-808.