Ellen Matthies is professor of environmental psychology at the Psychology Department of the Otto von Guericke University in Magdeburg, Germany. From 2009 to 2011 she was professor for Environmental Psychology at the Norwegian University of Science and Technology, Trondheim, Norway; from 2001 to 2010 associate professor (Hochschuldozentin) for Applied Psychology at the Ruhr-University Bochum, Germany. She accomplished her habilitation in 2001 with the topic “Coping with environmental threats and global environmental change at the Psychology department at Ruhr-University Bochum and also received her PhD there in 1993. Since 1994 as an assistant professor she has guided several research projects related to the fields of applied social psychology and environmental psychology (mainly funded by the German Research Foundation DFG), e.g. on the role of personal and social norms in resource consumption, the role of habitualization for behavioural change, and on the development and evaluation of interventions to promote changes in sustainability related behaviours. Her current research is located in the field of sustainability relevant behaviours.