Steven Petersen is the James S. McDonnell Professor of Cognitive Neuroscience in the Division of Biology & Biomedical Sciences and a Professor of Radiology. His research involves using behavioral and functional neuroimaging techniques to study the neural mechanisms underlying attention, language, learning and memory. One current area of research focuses on the development of language. This project employs direct statistical comparison of child and adult imaging data. Another area of focus is on identifying fMRI signals related to different aspects of task organization. These processes produce several different types of task-related signals that can be identified at key times during performance of a task.