Bob M. Fennis works as a Professor in Cognitive Behaviour at the Department of Marketing at Groningen University. His research interests include persuasion, social influence processes and the dynamics of "automatic" consumer behaviour. His research focuses on such issues as the effectiveness of marketing and selling techniques, advertising effects, and nonconscious influences on consumer goal pursuit and purchase behaviour. Wolfgang Stroebe is Professor of Social Psychology at Utrecht University. He is a former president of the European Association of Social Psychology, a Fellow of numerous psychological societies (e.g., BPS, APS) and co-editor (with Miles Hewstone) of the European Review of Social Psychology. One of his major research interests is strategies of attitude and behaviour change, and he has published widely on this topic.Fennis is the author of 'The Psychology of Advertising', published 2010 under ISBN 9780415442732 and ISBN 0415442737.