April 1997:
M.Sc. (Dipl.-Psych.) in Psychology, University of Freiburg, Germany

August 2002:
Ph.D. (Dr. phil.) in Psychology, summa cum laude, University of Mannheim, Germany.

May 2007:
Venia Legendi for Psychology in General (Habilitation in Psychologie), University of Mannheim, Germany.

December 2013:
Italian National Habilitation for Management, Full Professor level.

Positions held:

May 1997 thru April 1998:
Graduate research assistant in an NSF (German: DFG) funded project at the University of Heidelberg, Department of Psychology, Research Group on Learning and Instruction.

May 1998 thru April 2003:
Research associate at ZUMA, the Center for Survey Research and Methodology in Mannheim, working group on computer assisted interviewing, ZUMAOnlineResearch branch.

October 2000 thru February 2003:
Lecturer at the University of Mannheim, Department of Psychology II.
May 2003 thru February 2008:
Assistant professor at the University of Mannheim, Department of Psychology II.

March 2008 thru December 2015:
Associate professor at the Free University of Bozen-Bolzano (South Tyrol, Italy),School of Economics and Management.

January 2013 thru December 2015:
Research leave, team leader ´GESIS Panel´, GESIS Leibniz-Institute for the Social Sciences, Mannheim (Germany), Dept. of Survey Methodology and Design (SDM).

June 2013 thru December 2015:
Honorary full professor, University of Mannheim, School of Social Science.

January 2016 thru December 2016:
Acting team leader ´GESIS Panel´, GESIS Leibniz-Institute for the Social Sciences, Mannheim (Germany), Dept. of Survey Methodology and Design (SDM).

November 2014 thru June 2016:
Team leader ´Survey Operations´, GESIS Leibniz-Institute for the Social Sciences, Mannheim (Germany), Dept. of Survey Methodology and Design (SDM).

January 2016 thru June 2016:
Full Professor of Evidence-Based Survey Methodology, University of Mannheim, School of Social Science.

Current positions (since July 2017):
Director, ZPID - Leibniz-Institute for Psychology Information, Trier, Germany.
Full Professor for Psychological Research Methods, University of Trier, Germany.