While nearly all dialects on the British Isles have undergone the nurse merger, a process which merged the Middle English vowels /ɪ ɛ ʊ/ into the vowel /ə/ (which was later lengthened to /ɜ:/) in pre-rhotic positions, Scottish Standard English (SSE) is traditionally described as having retained a three-way distinction in these contexts. However, the gradual loss of this contrast has been observed in some varieties of Scottish English. This study investigates phonetic realizations within the nurse lexical set in SSE speech. 1227 tokens of the nurse vowel produced by ninety-two speakers were drawn from broadcast news, broadcast talks, legal presentations, non-broadcast talks, and unscripted speeches from the Scottish component of the International Corpus of English (ICE Scotland). The first two formants (F1 and F2) were measured, transformed into Bark and normalized. A Bayesian linear mixed-effects regression model showed that in purely acoustic terms, the vowels in fir, fern, and fur are not merged and have a distinct F1 and F2. However, the pre-rhotic items are distinct from the reference categories kit, dress, and strut in being more centralized, and in some genres fir and fern are more strongly drawn towards the center of the vowel space (and each other) than fur is. While the social variables age and gender do not influence realizations of the nurse vowels in formal Scottish English at this general level, orthography and the realization of the following /r/ have a clear effect. Inspection of individual speakers further shows that several types of partial merger of these vowels exist; it is argued that this perspective is needed to understand variation within the SSE nurse lexical set.

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nurse Vowels in Scottish Standard English: Still Distinct or Merged?