1Department of Speech & Hearing Sciences, Medical Sciences, Washington State University, Spokane, Washington, USA; 2School of Communication Sciences and Disorders and 3Institute for Intelligent Systems, University of Memphis, Memphis, Tennessee, USA; 4Konrad Lorenz Institute for Evolution and Cognition Research, Klosterneuburg, Austria; 5Center for Childhood Deafness, Boys Town National Research Hospital, Omaha, Nebraska, USA; 6Nuance Communications, Burlington, Massachusetts, USA; 7LENA Research Foundation, Boulder, Colorado, USA; and 8University of Cincinnati, Cincinnati, Ohio, USA.
This work was supported by National Institutes of Health Grants/NIDCD R01-DC009560 (co-principal investigators, J. Bruce Tomblin, University of Iowa, and M.P.M., Boys Town National Research Hospital) and (LENA Supplement) R01-DC009560-01S1. The role of D.K.O. in the paper was supported by Grant R01-DC011027 from the National Institute on Deafness and Other Communication Disorders and by the Plough Foundation. J.A.R., D.X., and J.G. are employees of the LENA Research Foundation. S.G. is a former employee of the LENA Research Foundation. D.K.O. is an unpaid member of the Scientific Advisory Board of the LENA Research Foundation. The content of this project is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute on Deafness and Other Communication Disorders or the National Institutes of Health.
Received May 21, 2014; accepted November 24, 2014.
Address for correspondence: Mark VanDam, Department of Speech & Hearing Sciences, Medical Sciences, Washington State University, 412 E. Spokane Falls Boulevard, Spokane, WA 99202, USA. E-mail: [email protected]
