This article investigates the Southern Vowel Shift—a possibly interrelated series of rotations in vowel space currently affecting the dialects of southern speakers—in terms of examining its classification as a chain-shift process and, more generally, providing a descriptive account of the phonetic character of the changes in each individual vowel class. Based on the work of Labov (1991, 1994) and Feagin (1986), it has been suggested that the Southern Shift involves changes in both the front vowels and the back vowels, with the tense and lax front vowel nuclei essentially switching places and the back vowels moving forward. The relationship of these changes in the front vowels and those in the back vowels has not been firmly established, but they appear to be driven by different social and linguistic forces. What is happening to the low front, the mid, and the low back vowel classes in the Southern Shift has only been superficially explored. A detailed instrumental analysis of the vowel systems of 25 native Memphians of selected ages, socioeconomic classes, and genders is presented, revealing the movement of vowel classes which seem to be playing an important role in the instigation or perpetuation of the Southern Shift. This analysis points out discrepancies about how previously cited vocalic changes are embedded in mid-southern speech and provides a picture of how these changes are affecting other changes in the system. The results suggest that, while many of the changes cited in the literature are indeed present in the sample, the interrelatedness of these changes and their prognosis to move to completion are not so clear.
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