1. Department of Speech, Language, and Hearing Sciences, The University of Arizona, Tucson, AZ, USA
2. Marja-Liisa Mailend is now at Moss Rehabilitation Research Institute, Einstein Healthcare Network, Elkins Park, PA, USA
3. Edwin Maas is now at the Department of Communication Sciences and Disorders, Temple University, Philadelphia, PA, USA
4. Department of Psychology, The University of Arizona, Tucson, AZ, USA