Acquisition Reversal : the Effects of Postlingual Deafness in Yoruba.

This is the first comprehensive account of prolonged hearing loss and its impact on a language that was once spoken fluently. The reader is introduced to a significant deaf population - Yoruba speakers who have been profoundly deaf for more than twenty years and who have no access to hearing aids or speech therapy. These speakers exhibit language loss patterns which mirror acquisition stages in the speech of Yoruba children. This similarity argues for a link between language loss and first language acquisition, and shows that prolonged hearing loss results in the reversal of language.

Frontmatter -- Contents -- Acknowledgments -- Abbreviations -- Chapter 1. Postlingual Deafness -- Chapter 2. The Yoruba: the people and their language -- Chapter 3. Deafness, Societal Attitude, and Language Adaptation -- Chapter 4. Yoruba Sign Language: A Basic Description -- Chapter 5. Postlingual Deafness at Age 5: Patterns of Loss after 25 Years -- Chapter 6. Postlingual Deafness at Age 8: Patterns of Loss after 25 Years -- Chapter 7. The Connection of Postlingual Deafness Language Loss to Acquisition -- Chapter 8. Summary, Suggestions for Rehabilitation and Further Research -- References -- Index.

Includes bibliographical references and index.

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