- Positivity X - Pretoria, South Africa (2019)
- Positivity IX - Edmonton, Canada (2017)
- Positivity VIII - Chengdu, China (2015)
- Positivity VII - Leiden, Netherlands (2013)
- Positivity VI - El Escorial, Spain (2009)
- Positivity V - Belfast, Northern Ireland (2007)
- Positivity IV - Dresden, Germany (2005)
- Positivity III - Rhodes, Greece (2003)
- Positivity II - Nijmegen, Netherlands (2001)
- Positivity I - Ankara, Turkey (1998)
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