The /ay/ data used in Fruehwald (2016)
a data.frame with 16 columns
unique id for each speaker
year of interview
speakers' years of schooling
vowel class in Labovian notation
normalized F1 (z-scored)
normalized F2 (z-scored)
location of vowel in word: coextensive, final, initial, internal
ARPABET transcription of the word
Labov, W., Rosenfelder, I. (2011). The Philadelphia Neighborhood Corpus of LING560 Studies
Fruehwald, J. (2016). The early influence of phonology on a phonetic change. Language, 92(2), 376<e2><80><93>410. https://doi.org/10.1353/lan.2016.0041
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