[1] MGH Inst Hlth Profess, Dept Commun Sci & Disorders, Boston, MA 02129 USA
[2] Appalachian State Univ, Beaver Coll Hlth Sci, Dept Rehabil Sci, Boone, NC USA
[3] Midwestern Univ, Speech Language Pathol Program, Glendale, AZ USA
[4] Univ Valladolid, Dept Evolutionary & Educ Psychol, Valladolid, Spain