Sometimes I feel the fear of uncertainty stinging clear: How Intolerance of Uncertainty and Trait Anxiety impact fear acquisition, extinction and the return of fear Adrian Wroblewski 1 *, Maike Hollandt 2 , Yunbo Yang 1 , Isabelle C. Ridderbusch 1 , Anne Pietzner 2 , Christoph Szeska 2 , Martin Lotze 3 , Hans-Ulrich Wittchen 4,5 , Ingmar Heinig 4 , Andre Pittig 6 , Volker Arolt 7 , Katja Koelkebeck 8 , Constantin A. Rothkopf 9 , Dirk Adolph 10 , Jürgen Margraf 10 , Ulrike Lueken 11,12 , Paul Pauli 13 , Martin J. Herrmann 11 , Markus H. Winkler 13 , Andreas Ströhle 14 , Udo Dannlowski 7 , Tilo Kircher 1 , Alfons O. Hamm 2 , Benjamin Straube 1+ , Jan Richter 2+ [1] Department of Psychiatry and Psychotherapy & Center for Mind, Brain and Behavior - CMBB, Philipps-University Marburg, Germany [2] Department of Psychology, University of Greifswald, Germany [3] Functional Imaging Unit, Diagnostic Radiology and Neuroradiology of the University Medicine Greifswald, Germany [4] Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden, Germany [5] Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilians University Munich, Germany [6] Translational Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany [7] Institute for Translational Psychiatry, University of Münster, Germany [8] LVR-Hospital Essen, Department of Psychiatry and Psychotherapy, University of Duisburg- Essen, Germany [9] Institute of Psychology, TU Darmstadt, Germany [10] Mental Health Research and Treatment Center, Ruhr ‐University Bochum, Germany [11] Center for Mental Health, Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital Wuerzburg, Germany [12] Department of Psychology, Humboldt-Universität zu Berlin, Germany [13] Department of Psychology I, Biological Psychology, Clinical Psychology, and Psychotherapy, University of Würzburg, Germany [14] Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité - Universitätsmedizin Berlin, Germany corporate member of Freie Universität Berlin, Humboldt- Universität zu Berlin und Berliner Institut für Gesundheitsforschung, Germany + These authors contributed equally. *Corresponding author: Dr. rer. nat. Adrian Wroblewski Department of Psychiatry and Psychotherapy & Center for Mind, Brain and Behavior - CMBB University of Marburg Rudolf-Bultmann-Str. 8 D-35039 Marburg (Germany) Phone: +49(0)6421-58-64454 E-Mail: Adrian.wroblewski@med.uni-marburg.de