2011 Visiting Scholar, Hebrew University Jerusalem, Center for the
Study of Rationality, Israel

2005 – 2006 Visiting Scholar, Purdue University

2001 Visiting Professor of Cognitive Psychology, University Oldenburg

2000 Visiting Scholar, Northwestern University, (DFG)

1997 – 1998 Visiting Professor for Cognitive Psychology, University Oldenburg

1996 Visiting Scholar, Purdue University, (Benjamin Winer Memorial Fund)

1995 Visiting Scholar, University of North Carolina at Chapel Hill, (DAAD)

1993 Visiting Assistant Professor, Purdue University, (Benjamin Winer Memorial Fund)

1992 – 1994 Postdoctoral Fellowship, Graduiertenkolleg, Oldenburg University

1989 – 1991 Purdue University, Indiana, USA

1986 – 1988 Research Associate, Hamburg University