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Published online by Cambridge University Press: 12 March 2026
Phonological underspecification for English vowels is addressed using data from language production. Patterns in speech errors induced by means of the experimental SLIPS procedure argue for radical underspecification; the underspecified vowel place features are [-high], [-low], [-back], and [-round] (as in /ε/). Similarity effects in naturally-occurring speech errors lead to the same conclusions. With respect to the question of why the underspecification of place features is consistent across languages for consonants but highly variable for vowels, it is argued that the difference between vowels and consonants is rooted in similar crosslinguistic differences in phoneme frequencies.
This research was supported in part by NSF Research Grant #BNS-8820757.