Intraspeaker Priming across the New Zealand English Short Front Vowel Shift.
Dan Villarreal, Lynn Clark
PMID 34743645WHAT IT FOUND
Speakers unconsciously repeat the phonetic shape of their own recent vowels.
A vowel produced with a high, front jaw position primes the next vowel to be high and front, even if it belongs to a different word or sound category. This effect fades within half a second.
Key findings
01The phonetic shape of a vowel is predicted by the speaker's immediately preceding vowel, showing a repetition effect that decays rapidly over time.
02Priming operates on peripherality (high/front position) rather than the specific direction of the historical sound change, so a high/front 'kit' primes a high/front 'trap'.
03Men showed stronger repetition effects than women, possibly because women are further advanced in the sound shift and have less room to vary.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study relies on monologues, so it does not account for how priming interacts with accommodation (matching a conversation partner's speech) in natural dialogue. The mechanism behind the gender difference is unclear; age could not be tested as a separate variable due to statistical constraints. The effect is statistical and probabilistic; priming influences but does not determine vowel production.
Declared interests
Funded by a Royal Society of New Zealand Marsden Research Grant. No commercial conflicts of interest reported.
The easy way to misread this
Do not interpret the rapid decay of the priming effect as evidence of a cognitive deficit or motor planning failure. The fading influence over milliseconds is a normal characteristic of linguistic priming, similar to how a physical habit loosens if not repeated immediately.