Variability of Tongue-Tip Placement: Acoustically Standard Production of /s/ Cross-Culturally Rosenfeld-Johnson, S. (2012, November). Poster session presented at the Annual ASHA Convention. Atlanta, GA. REFERENCES Bahr, D. C. 2001. Oral Motor Assessment and Treatment: Ages and Stages. Boston: Allyn and Bacon. Bobath, B. 1971. Motor development, its effect on general development, and application to the […]