Psychological Research Methods

Prof. Dr. Michael Bosnjak is head of the Department of Psychological Research Methods. His research interests include: Research synthesis methods, AI-based inference methods, survey methodology, open science, and consumer/business psychology.

Professor Bosnjak is Editor-in-Chief of Zeitschrift für Psychologie, the oldest Psychology journal in Europe (founded in 1890 by Hermann Ebbinghaus and Arthur König).

From July 2017 until December 2021, he was Director of the Leibniz Institute for Psychology (ZPID) in Trier, Germany. In 2022, he was delegated to Robert Koch Institute in Berlin (Germany) as Scientific Director and Department Head (Epidemiology and Health Monitoring).

Before joining the University of Trier in 2017, he was team leader for the area Survey Operations at GESIS - Leibniz Institute for the Social Sciences in Mannheim, Germany, and Full Professor for Evidence-Based Survey Methodology at the University of Mannheim, School of Social Sciences. Between 2013 and 2016, he was the founding team leader of the GESIS Panel, a probabilistic mixed-mode omnibus panel for the social sciences.

Previously, he held positions as an Associate Professor of Marketing at the Free University of Bozen-Bolzano, Italy (2008-2015), as an Assistant Professor of Consumer Psychology and Research Methods at the University of Mannheim, Germany (2003-2008), as a research associate at ZUMA, the Center for Survey Research and Methodology in Mannheim (1998-2003), and as a graduate research assistant at the University of Heidelberg (1997-1998).

Prof. Dr. Michael Bosnjak received his master degree (German: Diplom) in Psychology from the University of Freiburg (Germany) in 1997 with a thesis on Internet-based studies in Psychology. He earned a Ph.D. in Psychology with a dissertation on ´Nonresponse in Web Surveys´ (2002, summa cum laude, University of Mannheim), and is holding his ´venia legendi´ for Psychology since 2007 (University of Mannheim).

In June 2013, he was awarded a Honorary Professorship at the University of Mannheim, School of Social Sciences, and in December 2013, he was awarded the Italian National Habilitation for Management (Full Professor level).


We are happy to announce our guest Prof. Dr. Timo Gnambs from the Leibniz Institute for Educational Trajectories (LIfBi) in Bamberg.

Prof. Dr. Timo Gnambs will give a talk on Tuesday, 6 June 2023 at 18:00 c.t. in C9.

"Meta-Analysen von Randomized Control Trials mit fehlenden Informationen"

Terri Deocampo Pigott, Larry Hedges, Christina Bergmann, Wolfgang Viechtbauer and Michael Bosnjak in Dubrovnik, Croatia, May 2019
Terri Deocampo Pigott, Larry Hedges, Christina Bergmann, Wolfgang Viechtbauer and Michael Bosnjak in Dubrovnik, Croatia, May 2019.

Department information

Research and teaching interests
  • Research synthesis methods
  • AI-based inference methods
  • Survey methodology
  • Open science
  • Consumer/business psychology
  • Google Scholar 
Current courses
11401043 - B3 Recherche und Datenanalyse – Mi, 10 - 12, D 324
11401133 - C3 Wissenschaftliche Projektarbeit – Do, 18 - 20, D 034
11400956 - B2 Multivariate Verfahren – Do, 14 - 16, D 031
Bachelor- und Masterkolloquium – Di, 16 - 18, D 033
Courses winter term 2023/24

11401043 - B3 Recherche und Datenanalyse – Di, 16 - 18, B 121 (PC-Pool)
11401126 - C2 Empiriepraktikum – Do, 18 - 20, D 033
11400888 - FOV - "Reliability generalization meta-analyses in Management/Industrial/Organizational Psychology" – Mi, 10 - 14
Bachelor- und Masterkolloquium – Mi, 14 - 16, D 033

Department Members

0651 /
HeadProf. Dr. Michael BosnjakD 134201-2705
SecretaryAnette Weidler

D 133


Scientific StaffNND 135201-2738
Scientific StaffNND 131 
EmeritusUniv.-Prof. em. Dr. Günter Krampen
Dipl.-Psych., PsychTh
D 15201-2967
EmeritusUniv.-Prof. em. Dr. Leo Montada -201-2052
Mailing Address

Prof. Dr. Michael Bosnjak
Department of Psychology
University of Trier
54286 Trier / Germany