- Workshop on Science Communication as Collective Intelligence, hosted by SciBeh.org, 18-19 November 2021 (virtual).
- Workshop on Building an online information environment for policy relevant science, hosted by SciBeh.org, 9-10 November 2020 (virtual).
- Member, Program Committee, Conference on Climate Communication, Salzburg, Austria, September 2017.
- Member, Program Committee, SARMAC XII (Annual meeting of the Society for Applied Research in Memory and Cognition), Sydney, Australia, January 2017.
- World University Network meeting on Responding and Adapting to Climate Change: Recognizing and Managing Uncertainty in the Physical, Social, and Public Spheres. (with Richard Pancost and Tim Ballard). September 2014, Bristol, UK.
- SNF International workshop on Benchmarks in Working Memory, (Klaus Oberauer and Stephan Lewandowsky). July 2015, Vitznau, Switzerland.
- SNF International workshop on Benchmarks in Working Memory, (Klaus Oberauer and Stephan Lewandowsky). July 2014, Lucerne, Switzerland.
- Conference on Climate Change Mitigation and Adaptation: Opportunities and Challenges (with Richard Harper and Iain Walker). March 2012, Perth (100+ attendees).
- Australasian Mathematical Psychology Conference (with Ullrich Ecker). February 2010, Margaret River, Australia.
- Symposium on Terrorism and torture: The media, psychology, and public perceptions (with Werner Stritzke, David Denemark, Frank Morgan, and Joe Clare). August 2007, Perth, Australia (50+ participants).
- Workshop on Concept Formation and Memory (with Lisa Nimmo). July 2006, Margaret River, Australia (25+ participants)
- Australasian Cognitive Science Conference (with others). April, 2002, Fremantle, Australia (100+ participants)
- Australian Mathematical Psychology Conference (with Mike Kalish & John C. Dunn). November 1997, Perth, Australia (40 participants)
- 23rd Annual Australian Experimental Psychology Conference. April 1996, Perth, Australia (100+ participants)
- 26th Annual Meeting of the Society for Mathematical Psychology (with Scott D. Gronlund & Herve Abdi). August 1993, Norman, OK (100 participants)
- Conference in honor of Bennet B. Murdock’s 65th birthday. June 1990, Toronto, Canada (25 participants)
- Conference on Implicit Memory. August 1988, Perth, Australia
(30 participants)