The effect of voice disorders on lexical tone variation: Exploratory study in an African language

References

• Boersma, P., & Weenink, D. (2005). PRAAT: Doing phonetics by computer (version 4.3.01): Computer program. Amsterdam, The Netherlands: University of Amsterdam. Retrieved from http://www.praat.org/ accessed 5th January 2015.
   Google Scholar
• Bryman, Y. (2006). Integrating quantitative and qualitative research: How is it done? Qualitative Research, 6, 97–113. doi:10.1177/1468794106058877
   Google Scholar
• Ching-Hong, C. (2016). Effect size measures in a two-independent samples case with nonnormal and nonhomogeous data. Behaviour Research Matters, 48, 1560–1574. doi:10.3758/s13428-015-0667-z
   PubMed Web of Science ®Google Scholar
• Ciocca, V., Whitehill, T.L., & Ma, J.K.Y. (2004). The impact of cerebral palsy on the intelligibility of pitch-based linguistic contrasts. Journal of Physiological Antropology and Applied Human Science, 23, 283–287. doi:10.2114/jpa.23.283
   Google Scholar
• Cohen, J. (1988). Statistical power analysis for the behavioural sciences. (2nd ed.). Hillsdale, NJ Lawrence Erlbaum.
   Google Scholar
• Cole, D.T. (1992). An introduction to Tswana grammar. Johannesburg, South Africa: Longman Penguin SA.
   Google Scholar
• Colton, R.H., Casper, J.K., & Leonard, R. (2011). Understanding voice problems: A physiological perspective for diagnosis and treatment. (4th ed.). Philadelphia, PA: Lippincott Williams & Wilkins.
   Google Scholar
• Cooper, R.J., Wears, R.L., & Schriger, D.L. (2003). Reporting research results: Recommendations for improving communication. Annals of Emergency Medicine, 41, 561–564. doi:10.1067/mem.2003.135
   PubMed Web of Science ®Google Scholar
• De Bodt, M.S., Wuyts, F.L., Van de Heyning, P.H., & Croux, C. (1997). Test-retest study of the GRBAS scale: Influence of experience and professional background on perceptual rating of voice quality. Journal of Voice, 11, 74–80. doi:10.1016/S0892-1997(97)80026-4
   PubMed Web of Science ®Google Scholar
• Durand, M., Joseph, M., & Baker, A.S. (1998). Infections of the upper respiratory tract. In A.S. Fauci, E. Braunwald, K.J. Isselbacher, J.D. Wilson, J.B. Martin & D.L. Kasper (Eds.). Harrison’s principles of internal medicine (14th ed., p. 183). New York, NY: McGraw-Hill.
   Google Scholar
• Ferrand, C.T. (2012). Voice disorders: Scope of theory and practice. Boston, MA: Pearson Education, Inc.
   Google Scholar
• Ghasemi, A., & Zahediasl, S. (2012). Normality tests for statistical analysis: A guide for non-statisticians. International Journal Endocrinology and Metabolism, 10, 486–489. doi:10.5812/ijem.3505
   PubMedGoogle Scholar
• Jeng, J., Weismer, G., & Kent, R.D. (2006). Production and perception of Mandarin tone in adults with cerebral palsy. Clinical Linguistics and Phonetics, 20, 67–87. doi:10.1080/02699200400016539
   PubMed Web of Science ®Google Scholar
• Jones, G.L. (2016). Tone variation in Tswana-speaking individuals: The effect of voice disorders. (Unpublished Master’s dissertation, University of Pretoria, Pretoria, South Africa).
   Google Scholar
• Jones, G., Van der Merwe, A., Van der Linde, J., & Le Roux, M. (2018). Development of a Setswana tonal minimal pair word list as research tool. South African Journal of African Languages, 38, 127–135. doi:10.1080/02572117.2018.1463700
   Web of Science ®Google Scholar
• Landis, J.R., & Koch, G.G. (1977). The measurement of observer agreement and categorical data. Biometrics, 33, 159–174. doi:10.2307/2529310
   PubMed Web of Science ®Google Scholar
• Mitchell, M.L., & Jolley, J.M. (2010). Research design explained. (7th ed.). Boston, MA: Wadsworth Cengage Learning.
   Google Scholar
• McCabe, D.J., & Altman, K.W. (2017). Prosody: An overview and applications to voice therapy. Global Journal of Otolaryngology, 7, 555719. doi:10.19080/GJO.2017.07.555719
   Google Scholar
• Nguyen, D.D., & Kenny, D.T. (2009). Effects of muscle tension dysphonia on tone phonation: Acoustic and perceptual studies in Vietnamese female teachers. Journal of Voice, 23, 446–459. doi:10.1016/j.jvoice.2007.12.004
   PubMed Web of Science ®Google Scholar
• Snyman, J.W. (1989). An introduction to Tswana phonetics. Hout Bay, South Africa: Marius Lubbe.
   Google Scholar
• StataCorp. (2011). Stata statistical software: Release 12. College Station, TX: StataCorp.
   Google Scholar
• Tavakoli, H. (2012). A dictionary of research methodology and statistics in applied linguistics. Tehran, Iran: Rahnama Press.
   Google Scholar
• Van der Merwe, A., & Le Roux, M. (2014a). Dysarthria and apraxia of speech in selected African languages: Zulu and Tshwana. In N. Miller & A. Lowitt (Eds.), Motor speech disorders: A cross-language perspective (pp. 125–142). Bristol, UK: Multilingual Matters.
   Google Scholar
• Van der Merwe, A., & Le Roux, M. (2014b). Idiosyncratic sound systems of the South African Bantu languages: Research and clinical implications for speech-language pathologists and audiologists. South African Journal of Communication Disorders, 61, 22–29. doi:10.4102/sajcd.v61i1.86
   Google Scholar
• Vassarstats. (2012). Concepts and applications of inferential statistics. Retrieved from http://vassarstats.net/textbook/index.html/ accessed 22nd October 2015.
   Google Scholar
• Whitehill, T.L., & Wong, L.L.N. (2007). Effect of intensive voice treatment on tone-language speakers with Parkinson’s disease. Clinical Linguistics and Phonetics, 21, 919–925. doi:10.1080/02699200701602045
   PubMed Web of Science ®Google Scholar
• Wong, P.C.M., Perrachione, T.K., Gunasekera, G., & Chandrasekaran, B. (2009). Communication disorders in speakers of tone languages: Etiological bases and clinical considerations. Seminars in Speech and Language, 30, 162–173. doi:10.1055/s-0029-1225953
   PubMedGoogle Scholar
• Yip, M. (2002). Tone. Cambridge, UK: Cambridge University Press.
   Google Scholar
• Yiu, E.M.L., Van Hasselt, C.A., Williams, S.R., & Woo, J.K.S. (1994). Speech intelligibility in tone language (Chinese) laryngectomy speakers. International Journal of Language and Communication, 29, 339–347. doi:10.3109/13682829409031287
   Google Scholar
• Zerbian, S., & Barnard, E. (2008). Phonetics of intonation in South African Bantu languages. Southern African Linguistics and Applied Language Studies, 26, 235–254. doi:10.3109/13682829409031287
   Web of Science ®Google Scholar