1. Department of Communication Sciences and Disorders, West Virginia University, Morgantown, WV, USA
2. Department of Communication Science and Disorders, University of Pittsburgh, Pittsburgh, PA, USA
3. Center for the Neural Basis of Cognition, Carnegie Mellon University and University of Pittsburgh, Pittsburgh, PA, USA
4. Department of Communication Sciences and Disorders, University of Delaware, Newark, DE, USA
5. Department of Psychology, University of Pittsburgh, Pittsburgh, PA, USA
6. Learning Research & Development Center, University of Pittsburgh, PA, USA