In press, Journal of Comparative Psychology What guides a search for food that has disappeared? Experiments on cotton-top tamarins Marc D. Hauser 1,2 , Travis Williams 3 , Jerald D. Kralik 4 , Damian Moskovitz 1 1 Department of Psychology & 2 Program in Neurosciences, Harvard University 3 Department of Psychology, New York University 4 Department of Neurobiology, Duke University RUNNING HEAD: HAUSER ET AL.: Searching for food that has disappeared Correspondence: M. D. Hauser, Department of Psychology, Harvard University, Cambridge, MA, 02138; hauser@wjh.harvard.edu; Travis Williams, Department of Psychology, New York University, New York, NY, 10003; travis@psych.nyu.edu; Jerald D. Kralik, Department of Neurobiology, Duke University, Durham, NC; kralik@neuro.duke.edu; Damian Moskovitz, Department of Psychology, Harvard University, Cambridge, MA, 02138; moskovit@fas.harvard.edu