Running head: ACTION PERCEPTION IN 12-MONTH-OLDS 1 Effects of Movement Distance, Duration, Velocity, and Type on Action Prediction in 12-Month-Olds Moritz M. Daum, Anja Gampe University of Zurich, Switzerland Caroline Wronski University of Zurich, Switzerland University of Applied Sciences, Potsdam, Germany Manja Attig Leibniz Institute for Educational Trajectories, Bamberg, Germany Manuscript accepted for publication in INFANT BEHAVIOR AND DEVELOPMENT Correspondence concerning this article should be addressed to Moritz M. Daum, University of Zurich, Department of Psychology, Binzmuehlestrasse 14, Box 21, CH- 8050 Zurich, Switzerland. Phone: +41 (0)44 635 74 86, E-mail: daum@psychologie.uzh.ch.