Melissa Libertus is a fourth year graduate student in the Department of Psychology and Neuroscience. She received her B.Sc. in Cognitive Science from the University of Osnabrueck, Germany, before coming to Duke in 2004. Melissa is mainly interested in the development of numerical cognition and how numerical information is represented in the brains of preverbal infants, children and adults. She has collaborated with Marty Woldorff and Elizabeth Brannon on several EEG studies regarding these questions. In addition, she has also ventured into attention research and is currently working on an EEG study that investigates the effects of shifts of attention on higher-level visual processing.