1 RUNNING HEAD: Executive control and response suppression Executive Control in the Simon task: A Dual-Task Examination of Response Priming and its Suppression Birgit Stürmer Humboldt-University at Berlin, Germany Ellen Seiss University of Birmingham, UK Hartmut Leuthold University of Glasgow, Scotland, UK In press: European Journal of Cognitive Psychology Correspondence to: Dr. Birgit Stürmer Humboldt-Universität zu Berlin Biologische Psychologie / Psychophysiologie Rudower Chaussee 18 10099 Berlin Germany FAX: +49-30-2093-4888 e-mail: birgit.stuermer@cms.hu-berlin.de