This article examines both the front and back shifts of the Southern Vowel Shift in a rural Kentuckiana (south-central Indiana) community through 50 years of real time, from the middle of the 20th century to the early 21st century. Euclidean distance measurements between the pair of high front vowels FLEECE & KIT and between the pair of mid front vowels FACE & DRESS are subjected to ANOVAs. The mid front vowels are found to be involved in the SVS and increasingly so through real time; the high front vowels, in contrast, not only aren’t participating in the SVS but have exhibited movements in non-SVS directions. Fronting of the back vowels is analyzed through linear mixed-effects regression analyses. Except for the FOOT vowel, which remains stable over time in this community, the other back vowels, GOOSE, GOAT, and the nucleus of the MOUTH diphthong, all show real-time changes that are consistent with the SVS. Some of the real-time developments are at odds with profiles of change through apparent time, which underscores the value of real-time data when and where it is available.

中文翻译：

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肯塔基州南元音偏移的实时趋势研究

本文通过 50 年的实时时间，从 20 世纪中叶到 21 世纪初，研究了肯塔基州（印第安纳州中南部）农村社区中南元音转移的前后变化。一对高前元音 FLEECE 和 KIT 之间以及一对中前元音 FACE 和 DRESS 之间的欧几里得距离测量受到方差分析。中前元音被发现与 SVS 相关，并且通过实时性越来越多。相比之下，高前元音不仅不参与 SVS，而且表现出在非 SVS 方向上的运动。通过线性混合效应回归分析分析后元音的前沿。除了在这个社区中随着时间的推移保持稳定的 FOOT 元音之外，其他的后元音 GOOSE、GOAT、和 MOUTH 双元音的核，都显示出与 SVS 一致的实时变化。一些实时发展与明显时间的变化概况不一致，这强调了实时数据何时何地可用的价值。