Roman Prokopenko, Ph.D. (Biophysics), is a post-doctoral fellow leading the laboratory's efforts in a project funded by the Patrick & Catherine Weldon Donaghue Medical Research Foundation. Addressing nonspeech motor control and motor learning in both children and adults who stutter, this work forms a critical component of an extensive stuttering research program. Specific aims of the project are (1) to investigate stuttering vs. nonstuttering individuals' ability to learn sensorimotor mappings, (2) to investigate stuttering vs. nonstuttering individuals' ability to accurately predict self-generated movement consequences, and (3) to dissociate the relative roles of afferent and efferent pathways in stuttering individuals' sensorimotor problems.