2011	Robert Cialdini
	Arizona State University, Phoenix, USA
	Title: Norms-based Messaging: An Untapped Power Source for Environmental Action
2009	Paul Slovic
	University of Oregon, USA
	Titel: Risk as Analysis and Risk as Feeling: Seeking Environmental Sensitivity in a World of Data
2007	P. Wesley Schultz
	California State University, San Marcos, USA
	Titel: Environmental Concern as Implicit Social Cognition