1. Department of Communication Science and Disorders, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, PA, USA
2. VA Pittsburgh Healthcare System, Pittsburgh, PA, USA
3. Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh, PA, USA
4. Learning Research and Development Center, Kenneth P. Dietrich School of Arts & Sciences, University of Pittsburgh, Pittsburgh, PA, USA
5. Department of Psychology, University of Pittsburgh, Pittsburgh, PA, USA