Working Title: Computerized Cognitive Training to Reduce Rumination in Major Depression: A Randomized Controlled Trial Ulrike Zetsche* 1+ , Pauline Neumann 1+ , Paul-Christian Bürkner 2 , Babette Renneberg 1 , Ernst H.W. Koster 3 , & Kristof Hoorelbeke 3 1 Clinical Psychology and Psychotherapy, Freie Universität Berlin, Berlin, Germany; 2 Department of Statistics, TU Dortmund University, Dortmund, Stuttgart, Germany; 3 Department of Experimental Clinical and Health Psychology, University Ghent, Belgium. *Corresponding author: Ulrike Zetsche, Freie Universität Berlin, Clinical Psychology and Psychotherapy, Habelschwerdter Allee 45, 14195 Berlin, Germany, phone: +49-30-838 55925; fax: +49-30-838 4 55925; u.zetsche@fu-berlin.de + These authors contributed equally to this work.