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the claim
There is a phonetic difference between long vowels and double vowels in natural language
the verdict
INSUFFICIENT LEANING
refutedsupported
the weight of evidence
2 sources for · 0 against

The retrieved literature discusses phonetic properties of vowel quantity and transcription practices in specific natural languages, but offers only partial coverage regarding the distinct acoustic profiles of long versus double vowels.

Evidence for · 2
2014 · cited by 0
We investigated vowel quantity in Yakut (Sakha), a Turkic language spoken in Siberia by over 400,000 speakers in the Republic of Sakha (Yakutia) in the Russian Federation. Yakut is a quantity language; all vowel and consonant phonemes have short and long contrastive counterparts. The study aims at revealing acoustic characteristics of the binary quantity distinction in vowels. We used two sets of data: (1) A female native Yakut speaker read a 200-word list containing disyllabic nouns and verbs with four different combinations of vowel length in the two syllables (short–short, short–long, long–short, and long–long) and a list of 50 minimal pairs differing only in vowel length; (2) Spontaneous speech data from 9 female native Yakut speakers (aged 19–77), 200 words with short vowels and 200 words with long vowels, were extracted for analysis. Acoustic measurements of the short and long vowels’ f0-values, duration and intensity were done. Mixed-effects models showed a significant durational difference between long and short vowels for both data sets. However, the preliminary results indicated that, unlike in quantity languages like Finnish and Estonian, there was no consistent effect of f0 as the phonetic correlate in Yakut vowel quantity distinction.
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The analysis

rails:sufficiency:partial_only:for=0+2p:against=0+0p | v55:multi_partial_one_side:lean=lean_partial:for:one_sided

More for · 1
2026 · cited by 0
... Long vowels are indicated orthographically with a macron ( e.g. , kūkā / ku : ku : / ' pigeon ' ) , and minimal pairs are common ( e.g. , kēkē / ke : ke : / ' armpit , and keke / keke / ' cake ' ) . There ... phonetic differences . Both ... This volume presents a paradigm shift in the world's knowledge about children's speech development, with 80 chapters covering 75 languages and language varieties or dialects from across the globe. Each of the chapters follows the same structure, facilitating comparison across languages and dialects. Researchers and students can identify relationships between common and unique elements of children's speech to develop new theories and enhance understanding. Crucially, the curated data in the chapters can be used by communication specialists to collaborate with families and communities, in order to support children's home language maintenance and speech development, including in languages not spoken by the specialists. The Oxford Handbook of Speech Development in Languages of the World outlin The Oxford Handbook of Speech Development in Languages of the World by Sharynne McLeod - Books on Google Play The Oxford Handbook of Speech Development in Languages of the World Sharynne McLeod Jun 2026 · Oxford University Press Ebook 1008 Pages family_home Eligible info Rp 4.145.111 Rp 2.901.578 Buy Free sample Add to wishlist This volume presents a paradigm shift in the world's knowledge about children's speech development, with 80 chapters covering 75 languages and language varieties or dialects from across the globe. Each of the chapters follows the same structure, facilitating comparison across languages and dialects. Researchers and students can identify relationships between common and unique elements of children's speech to develop new theories and enhance understanding. Crucially, the curated data in the chapters can be used by communication specialists to collaborate with families and communities, in order to support children's home language maintenance and speech development, including in languages not spoken by the specialists. The Oxford Handbook of Speech Development in Languages of the World outlines a transformative approach by which the discipline can overcome traditional English- and Western-centric biases by respecting and acknowledging longstanding traditions of research, theories, and knowledge from a wide range of countries and cultures - including knowledge not previously translated into English. Languages spoken by First Nations people and traditionally marginalized groups are given equivalent status to majority languages, and the language maps, resources, and pronunciation guides have been created using a rights-based, social justice approach, acknowledging the impact of colonization. This volume presents a paradigm shift in the world's knowledge about children's speech development, with 80 chapters covering 75 languages and language varieties or dialects from across the globe. Each of the chapters follows the same structure, facilitating comparison across languages and dialec... See more about this book Sharynne McLeod is a Distinguished Professor at Charles Sturt University, specializing in children's speech and language acquisition. She has a legacy of leading interdisciplinary teams that undertake impactful and international research into multilingual children's speech, and her transformative work has reframed the speech-language pathology profession by foregrounding communication rights and social justice. She has received Honors of the American Speech-Language-Hearing Association and Life Membership of Speech Pathology Australia, and is President of the International Clinical Phonetics and Linguistics Association. Her many publications include Introduction to Speech, Language, and Literacy (co-edited with Jane McCormack; OUP, 2015) and Interventions for Speech Sound Disorders in Children (2nd ed., co-edited with A. Lynn Williams and Rebecca J. McCauley; Brookes Publishing, 2021). Sharynne McLeod is a Distinguished Professor at Charles Sturt University, specializing in children's speech and language acquisition. She has a legacy of leading interdisciplinary teams that undertake impactful and international research into multilingual children's speech, and her transformative... See more about this author Write a review Smartphones and tablets Install the Google Play Books app for Android and iPad/iPhone . It syncs automatically with your account and allows you to read online or offline wherever you are. flag Flag as inappropriate The Oxford Handbook of Speech Development in Languages of the World Sharynne McLeod Rp 4.145.111 Rp 2.901.578 Working with Families in Speech-language Pathology Nicole Watts Pappas Rp 2.091.228 Rp 1.463.860 Early Childhood Voices: Children, Families, Professionals Linda Mahony Education Rp 3.633.364 Rp 2.543.355 Early Childhood Voices: Children, Families, Professionals Linda Mahony Education Rp 3.633.364 Rp 2.543.355 Metaphors We Live By George Lakoff 4.6 star Rp 272.518 Rp 190.763 Language Unlimited: The Science Behind Our Most Creative Power David Adger Science & math 5.0 star Rp 263.797 Rp 184.658 The Taking of Getty Oil: Pennzoil, Texaco, and the Takeover Battle That Made History Steve Coll Business & investing 3.7 star Rp 478.062 Rp 334.643
Everything we examined (3) — 2 independent sources
This check searched the claim as stated. It did not run a separate search for evidence against it.
  1. Phonetic correlates of phonological quantity of Yakutpeer-reviewedno side taken
  2. The Oxford Handbook of Speech Development in Languages of the Worldreferencesame source L3no side taken
  3. Phonetics and Speech Sciencereferencesame source L3no side taken
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